I have already posed this question on my Twitter thing in a Tweet, but wanted to ask again here, since more useful ideas for useful and entertaining things for kids to put in the book would be helpful:

• what did you learn as a kid (not in school) that was extremely helpful to you?
• What did you learn later that would ahve been extremely helpful had you learned it as a kid?
• What have you still not learned that you wish you had?
• What misconception that you had as a kid was it really helpful to have cleared up?

Helpful in any sense of the word.

Posting answers here constitutes permission to use them as inspiration for said theoretical book.