My first published writings were trying to take scientific concepts and make them clear for a general audience.

Kids need to encounter kids like themselves - kids who can sometimes be crabby and fresh and rebellious, kids who talk back and disobey, tell fibs and get into trouble, and are nonetheless still likable and redeemable.

Strength is the capacity to break a chocolate bar into four pieces with your bare hands - and then eat just one of the pieces.

Kids are always writing me: 'I had a bad day too.' 'I got gum in my hair.' And the kids also write to me to pass on advice to Alexander. My favorite one of those being, 'The next time you have a bad day, blame your brothers.' I didn't expect this. It's certainly the most successful of my books.

Thank you' is never enough for me to say to my family.

I think the idea that the community you live in is an extension of your family is a really nice thing for people to think about and to wish for in their own lives.

When I was young and growing up in New York, my parents took me to children's theater quite often - elaborate presentations of 'Goldilocks' and 'Rapunzel' for Upper East Side kids. As I grew older, they took me to adult theater, mostly musicals.

Fall on Your Knees' is really a story about secrets and family, and the idea that there are some stories or truths that need to be expressed.