I already posted my notes in LessWrong Hamburg Meetup Notes - Diet, but I'd like to relay an anecdote that just happend: My two oldest sons (8, 10) participated in our meetup. Actually they were told that it would be boring grow-up talk and didn't need to participate. But they sat in the circle, listened and occassionally commented or asked something. I though they just socialized. But I was wrong. They did listen. This evening one of them came out of his room with his alarm clock and told me:

• He: "It has a blue light and that's bad for sleeping."

• Me: "Why?"

• He: "Because red light is good for getting tired and blue light makes one awake"

• Me: "How do you know?"

• He: "I learned it on Friday at the LessWrong get-together"

Obviously he did listen and reflect what we talked about.

Lesson: Don't underestimate your children and better let them participate in any rational discussion. The can just profit from it.