This book is from the 1960’s or 1970’s. I remember it from the mid 1970’s. Written for preK-2nd grade. Was even read on Captain Kangaroo. It was illustrated in black and white drawings. The main character had a long ponytail. She was jealous of her best friend. Her best friend had short hair. The 2 girls went to school together, I would guess preschool or kindergarten. The main character’s mother babysat the best friend also. The main character always tried to do what her friend does but it never works out and she makes mistakes. The best friend seems to do everything “perfect.” One page I remember has the girls painting at easels. The best friend has a pretty picture and the main character has a sloppy mess. Can’t remember title or author. Have searched for this book for over 10 years.