Chicka Chicka 1, 2, 3 by Bill Martin Jr.

1 told 2 and 2 told 3, "I'll race you to the top of the apple tree." One hundred and one numbers climb the apple tree in this bright, rollicking, joyous book for young children. As the numerals pile up and bumblebees threaten, what's the number that saves the day? (Hint: It rhymes with "hero.") Read and count and play and laugh to learn the surprising answer.