"A Sick Day for Amos McGee," illustrated by Erin E. Stead and written by Philip C. Stead (ages 4-8, Roaring Brook Press, 32pp.) is the 2011 Caldecott Medal winner. The unselfish effort that Amos McGee has poured into the care of his zoo friends is lovingly reciprocated by these animals when Amos is feeling under the weather.