The book is Pajama Time by Sandra Boynton. (I HIGHLY recommend all her books!!)
Just in case it's been awhile since you've heard toddler talk the story goes.....
Some are Green
Some are Pink
Some are Ugly
Some are strips
Some are polka dots
Disclosure I received complimentary products for the purpose of my review. No other compensation was provided. The opinions are mine and 100% honest. I have not been influenced in any way.