Beep, beep. The sun is out, the flowers are up, and Little Blue Truck is taking Toad for a ride around the farm. Behind every flap is a baby animal newly arrived, and the whole book runs on the one question a toddler never gets tired of asking: who is under there?

Alice Schertle writes in a bounce that reads aloud without effort, and Jill McElmurry paints the spring farm in the soft pastel light that made this series a number one New York Times bestseller. Sixteen thick board pages with flaps built for the age that opens them hard.

It slides into an Easter basket, survives a stroller, and gets requested every night from March onward.