- Spouse was Valentine Chatenay.
- Daughters were Lucienne and Jacqueline Piaget.
- Son was Laurent Piaget.
- He wrote his first scientific paper at age 10.
- His most famous book was The Language and Thought of the Child.
What he contributed
He was behind the thought that younger children thought different than older children. He was known for the research behind with how thinking develops in children over the years as they get older.