Little Frog and the Spring Polliwogs by Jane Yolen, and illustrated by Ellen Shi, in book four of the Little Frog and the Four Seasons series, the feisty heroine Little Frog is on a new adventure. The spring polliwogs are on their way, and Little Frog is trying to get ahead of the arrival of her new brothers, sisters, and cousins of hers. They can be so mischievous! Paperback, 32 pages. Recommended for ages 4 to 8 years old.