A Sick Day for Amos McGee by Philip C. Stead

Every day Amos McGee spends a little bit of time with each of his friends at the zoo, running races with the tortoise, keeping the shy penguin company, and even reading bedtime stories to the owl. But when Amos is too sick to make it to the zoo, his animal friends decide it's time they returned the favour.

A delightful picture book about true friendship.