I'm Not Tired Yet by Marianne Richmond
I do have a grandson who is 6 and this is him, very hard to get him to go to bed and this book is 'right on target'.
Illustrated very colorful children's bedtime story with suggestions to try other
things to get your child to go to bed.
Bugs, monsters and his favorite bear to cuddle, and a caterpillar tickle
among other things are just what he needs to fall asleep.