In Sad, Mad, Glad Hippos, the hippos experience a range of emotions familiar to any young reader—from boredom and frustration to anger, sorrow and, eventually, happiness. There's even a stint in the time-out chair! Featuring Jane Yolen's delightful rhyming text and Vlasta van Kampen's spectacular illustrations, each edition has been designed to appeal to the imagination of infants and toddlers. Children will recognize their own moods reflected in these zany hippos, and will learn from the rollicking story. And with sturdy, board-book construction (complete with rounded edges), these classics will stand the test of time — and teething!