About the Holiday
There’s still time to celebrate one of the best months of the year—Picture Book Month! If you’re in shopping mode, be sure to put plenty of picture books on your list for the kids in your life. And don’t forget the littlest readers in your life. Sharing board books, with their sturdy pages and just-right size, is the perfect way to get babies and preschoolers excited about books, reading, and the special times in their life – as you’ll see with today’s book.
Happy Birthday, Trees!
Written by Karen Rostoker-Gruber | Illustrated by Holly Sterling
Three children are excited to be celebrating Tu B’Shevat together. One boy shows the others the little sapling they can plant then the three dig in with their shovels to create the perfect hole to nurture it. When the hole is just the right size, they carefully place the tree in it and tell readers, “then, we’ll fill the hole with dirt. / (An extra shovel doesn’t hurt.) / We’ll fill the hole with lots of dirt!”

Image copyright Holly Sterling, 2020, text copyright Karen Rostoker-Gruber, 2020. Courtesy of Kar-Ben Publishing.
When the tree is all snug in its new home, it’s time to feed it (and have some giggly fun). “Then, we’ll spray the garden hose, / and wet the tree (and soak our clothes). / On Tu B’Shevat we’ll spray the hose! Throughout the year, the kids watch as their tree grows taller and sturdier. When the weather turns warm, they play around the tree, singing “for all the trees” with delight as they await the day when Tu B’Shevat comes around again and the tree’s blossoms “fill the air with sweet perfume.”

Image copyright Holly Sterling, 2020, text copyright Karen Rostoker-Gruber, 2020. Courtesy of Kar-Ben Publishing.
Karen Rostoker-Gruber’s celebration of Tu B’Shevat takes little ones step-by-step through the thrill of planting a tree and watching it grow. Her breezy, exuberant verses incorporate simple rhymes and repeated phrases that will allow even the youngest children to join in after a first reading. In her sweet board book Rostoker-Gruber captures the excitement kids feel for special holidays and the pride they feel when participating in their family’s or friends traditions. The cyclical nature of her story will also inspire children to want to plant and tend to their own tree for Tu B’Shevat (celebrated beginning at sundown on January 27, 2021 through nightfall on January 28) or when weather conditions permit.
Bright and filled with the high spirits of childhood, Holly Sterling’s illustrations of three adorable kids working together to plant a tree will captivate little readers. Decked out in their gardening clothes and each with a shovel, the three crouch and lie on the ground next to the hole to make sure the tree goes in straight and safely. Sterling has an eye for the kinds of realistic details that define children’s behavior: to make sure the hole is filled to the brim, one little boy pours on dirt from two shovels—one in each hand; and under the arched spray of the hose, the girl raises her arms to welcome the cool spray while a boy sticks out his tongue for a sip. Sterling’s lovely color palette and graceful lines create a cheerful, fresh story that adults will want to share with their children again and again.
A joyful and lively way to celebrate and/or introduce Tu B’Shevat to little ones as well as a charming story for young nature lovers any time of the year, Happy Birthday, Trees! would be an enchanting addition to home, school, and public library collections.
Ages 1 – 4
Kar-Ben Publishing, 2020 | ISBN 978-1541545649
You can download a teacher’s guide to Happy Birthday, Trees! from the Kar-Ben Publishing website here.
Discover more about Karen Rostoker-Gruber and her books on her website.
To learn more about Holly Sterling, her books, and her art, visit her website.
Meet Karen Rostoker-Gruber
You have a very interesting and varied career! Before you wrote books for children, you published several humorous books for adults. Your children’s books also incorporate humor. Can you talk a little about your style of humor and how you’ve expressed it throughout your life?
I’ve been writing since I was 8 years old. I wanted to write for children, but the adult humor market was easier, at the time, to break into.
I started writing humor when I began college. Things were so strange at Trenton State that I had to start writing things down. The first humor book I wrote was called The Unofficial College Survival Guide.
I had worked in the kitchen as a waitress for the college serving alumni dinners—sometimes to 200 – 300 people. I needed the money and it was the only way to secure edible food.
One night, while piling my tray with plates of food for the next alumni dinner, I noticed a sign on a barrel that said, “grade D,” but edible. I opened the barrel and there were thousands of hot dogs. I had no idea what “grade D, but edible” meant, but I no longer wanted to find out. After that day, I started eating cereal for breakfast, lunch and dinner.
I also kept finding humor on campus—mostly in the cafeteria; it wasn’t hard. There was literally humor everywhere I looked.
When I got married, my humor book, Remote Controls Are Better Than Woman Because. . . became a HUGE hit. I was on the Ricki Lake Show back then and over 60 live radio shows. Then came my book, Telephones Are Better Than Men Because. . . I wrote both of those books on sticky notes in my car because I had a stop-and-go, 45-minute drive to work every day. I’d write new quotes down on a sticky note and fling them around in my car.
My book, If Men Had Babies, (lullabies would be burped… Prenatal vitamins would taste like honey-roasted beer nuts…, Golf carts would come equipped with car seats…”) was hysterical to me as a first-time mom. I wrote in between my daughter’s nap time, doing the laundry, the dishwasher, cleaning the house, and making breakfast, lunch, and dinner.
As far as incorporating humor into my children’s books, sometimes I use puns, which is why my characters are mostly animals. Animal puns are fun. I would sit on my driveway for hours, while my daughter drove her Barbie car, looking at the dictionary to find good cow, sheep, goat, chicken, and cat puns.
I also use a bit of adult humor in my books. There should be humor for the adult reading the book, too. In my book, Farmer Kobi’s Hanukkah Match my favorite line is when the sheep say, “Her name was Polly Ester, she was a faaake,” baaed the sheep.
(Get it? Polyester is fake vs. wool from the sheep!)
Here’s also a favorite page from my book:
You’ve had a long and steady career as a children’s author. What first inspired you to write for children? What’s one thing that has changed for writers since you began? What’s one thing that has stayed the same?
I’ve been writing for children since I was 8 years old. The only thing that really changed was that I actually started sending out my work in 1988-ish instead of just keeping manuscripts in my drawer. But from 1988 until 2000, I mostly received rejection letters—nice ones (that are now in my oxymoronic rejection letter binder), but rejection letters nevertheless.
My path to publication changed once I went to a conference and met with editors. After attending the conference, each mentee was able to submit directly to their mentor and other editors that you met there. And, you were able to write “requested material” on the outside of the envelope. This was important back then because all “Requested Material” manuscripts passed the slush pile and went directly to the editor it was addressed to. (Back in 2000 you submitted via snail-mail and there really were slush piles.) I saw them! For real!
The conference that I went to was the Rutgers One-on-One Conference. At that conference my mentor (Karen Riskin from Dial Books for Young Readers) took two of my manuscripts back with her to Penguin Putnam (it’s called Penguin Random House now). Both manuscripts wound up getting published: Food Fright was published by Price Stern Sloan in 2003 and Rooster Can’t Cock-a-Doodle-Doo was published with Dial Books for Young Readers in 2004.
After the success of Rooster Can’t Cock-a-Doodle-Doo, (selling 250,000 copies) I met another editor (Margery Cuyer) at an informal conference. She went on to acquire five of my books for Marshall Cavendish: Bandit, Bandit’s Surprise, Ferret Fun, Ferret Fun in the Sun, and Tea Time.
The difference from then to now is that these days you need to meet editors one-on-one or you need to have an agent. I can’t get into the big publishing houses that I used to submit to before because their policies have changed. I had 14 traditionally-published books out there with great houses before I got an agent. I’m NOT an overnight success story—far from it.
The setting for Happy Birthday, Trees! is Tu B’Shevat or the Jewish Arbor Day. Can you talk a bit about this holiday, it’s meaning, and how it is traditionally celebrated?
Tu B’Shevat is basically Earth Day. I think the PJ Library says it best on my teacher’s guide:
“The Jewish holiday of Tu B’Shevat, also known as the Birthday of the Trees, celebrates the critical role that trees play in life.” Jewish concepts: “Trees and the environment have particular importance in Jewish thought. From the very beginning of the Torah (the first five books of the Bible) we are taught to respect all things that grow, as Adam is placed in the Garden of Eden to “keep it and watch over it” (Genesis 2:15). The value of bal tashchit, which translates from the Hebrew as “do not destroy,” has become the Jewish ecology mantra. Put into action, this concept means we are all partners in preserving the beauty and sustainability of our world.” “Traditionally, Jews eat the fruit of a tree only after it is three years old. The 15th day of the Hebrew month of Shevat, called Tu B’Shevat, became the trees’ birthday to help people determine when to first harvest their fruit. This holiday is gaining significance today as the Jewish Earth Day.”
I love the structure of Happy Birthday, Trees!, especially the rhythmic repetition that’s so enticing for little ones to join in on. There’s also a playful humor that kids will love. What was your writing journey for this book?
I love bits of rhyme, repeated refrains, humor, and animal puns, so I always try to incorporate a few of these things in my books. I also know that kids love predictability. The journey for the book, “Happy Birthday, Trees”:
I was invited to a luncheon in NY for the PJ Library. About 20 other authors were there. At that time I had three published Jewish-themed books, Farmer Kobi’s Hanukkah Match, Maddie the Mitzvah Clown, and The Family and Frog Haggadah, which is a real haggadah that was featured in the NY Times!


They told us that they were actively looking for board books and chapter books at the time. I had a lot of board books in my drawer already, so I sent them the one that I liked the best. At that time it was called, “Happy Birthday to the Trees.”
Months later (I forgot all about sending that story into the PJ Library) I got a call from the PJ Library that I won the author incentive award—2,000 dollars. Then my agent (I now had an agent) Karen Grencik found a publisher for it.
Holly Sterling’s illustrations are adorable and really capture the delight of the children. What was your first impression when you saw Holly’s pages?
I was super-excited about Holly’s illustration sample that Joni Sussman from KarBen showed me, so I couldn’t wait to see what she would do with this very simple board book. I LOVE the illustrations. The children look like they are having a blast on the front cover.
A Crowded Farmhouse Folktale definitely combines humor with a heartfelt message. The story is a retelling of a traditional Yiddish tale. What about this tale really resonated with you for today’s kids? How did you make it your own?
I was reworking a folktale for one editor, but by the time I found a folktale that I liked and reworked that editor had already taken on a story too similar to it. I remembered this story as a child, but I wanted to make it a folktale for everyone, so I took out the Rabbi and added a wise woman instead. Every story that I read had a wise man—times have changed.
I also added a bit of rhyme and a repeated refrain. The story is basically about being grateful for what you have, which is perfect for COVID times as everyone is feeling like Farmer Earl with family members working and learning in the house; it’s too crowded.
If you had to live with three groups of animals like the family in your book—small, medium, and large—what would they be?
I love hamsters (They’re sooo cute and fuzzy).
Goats crack me up; they always look like they’re up to something.
As far as large animals go, there are too many that I’d like to have: elephants (I could teach them to paint), dolphins and gorillas (I could teach them to speak—I’m fascinated by Koko the gorilla), and pandas—just because they look so cuddly.
Oh, and unicorns (because they’re magical).
I love Kritina Swarner’s whimsical-yet-realistic illustrations, especially as the house becomes more and more crowded and chaotic. Do you have a favorite spread?
I love her work. There’s so much detail: in the wise woman’s dress, the fabric on her chair. Also, if you look closely, the plants are growing in her window from scene to scene, there’s a mouse under a bed, and my favorite spread is the toilet paper scene. However, I also like the expressions on the cat’s faces throughout the book. They are NOT amused at the amount of animals in the house.
You’re also an accomplished ventriloquist and have an adorable puppet named Maria who accompanies you on visits to schools and libraries. How did you get involved in ventriloquism and can you describe your program briefly? How do the kids respond to Maria?
I am a self-taught ventriloquist. I used to talk for my sister’s blanket, her food, and her dolls. She was 5 years younger than I was so she was the perfect audience.
I take Maria to every school visit–even my virtual ones (I just did one with 600 children). In my program I talk to children about every step I take from sticky notes at 3 am, to revisions, to submitting a polished manuscript to an agent or an editor.
Maria is my side-kick, because you had better be funny if you are in front of 350 – 600 children. Plus, kids LOVE Maria! Some don’t know how she talks; it’s magical to them and I don’t want to ruin that magic.
If Maria and I are doing “high tea” at a tea house or a public show at a library, I have to bring Maria’s car seat, eye mask, and blanket. Children follow me out to my car to watch me buckle her in with a seat belt.
One time, after a show, a boy came up to me and wanted to know how his parents could “buy” him a puppet like Maria. I told him that I got the last talking puppet on the internet. Enough said.
Here’s Maria as Alice in Wonderland for another show that we did. She likes to dress up. (It took me three hours to sew felt Mary Janes onto her white socks. Ugh!)
One day I had to take Maria shopping to Walmart to get her PJs because we had a bedtime, bears, and books show. I didn’t know her size. I held Maria up in the seat of the cart with my right hand while pushing the cart with my left hand. We had quite the following that day up and down the aisles. Kids just wanted to follow her around.
What do you like best about being an author for children?
My favorite part is when I get to see the illustrations; to see if the illustrator took my words to a new level. And, I LOVE seeing children enjoying my books and laughing at the puns.
What’s up next for you?
I’m always working on something, but it’s always a waiting game. Anything can happen on any day. An editor can email me from a year ago to tell me that something that I sent them is now a go. I’m not going to lie—

every day is full of surprises and disappointments. Being an author is very emotional. You have to have thick skin.
Thanks so much, Karen, for this awesome discussion about your books and sharing so much about your life as an author! I wish you all the best with Happy Birthday, Trees!, A Crowded Farmhouse Folktale, and all of your books!
Picture Book Month Activity
Plant a Tree! Activity Pages
Whether you need to wait awhile before you can plant a tree or are in a warm-weather locale that allows for planting now, you can enjoy these two tree activity pages!
Plant a Tree Coloring Page | Stately Tree Dot-to-Dot
You can find Happy Birthday, Trees! at these booksellers
Amazon | Barnes & Noble | Books-a-Million