The compact caterpillar unfolds to become two fun number exercises for youngsters: on one side, the numbered panels of the caterpillars body open to reveal countable groups (from 1 bicycle all the way up to 8 spider legs, 9 ladybug spots, and 10 fingers) and the spelled-out name of the number. On the reverse, each car of a train carries a countable cargo--1 teddy bear, 2 trucks, 3 cows. A sturdy slipcase protects the book from wear and tear.

Calino is a painter and graphic designer who lives in Paris.