Ten little owls sit in a tree on a dark night. One by one they fly away until only one is left on the branch. Daylight is coming and it's bedtime for the sleepy little owl. Goodnight, little owl!This book helps young children understand the concept of subtraction by visually representing it with fun and simple illustrations of birds on a branch. Your child will love counting down with you as one by one the little owls leave their perch, until only one is left and it's bedtime for sleepy owls--and kids too!