> "Could a creative adult also enjoy this?" That's a very good metric. I've had friends ask me when I come up with an activity or toy, "how did you think of x?

> "Could a creative adult also enjoy this?" That's a very good metric. I've had friends ask me when I come up with an activity or toy, "how did you think of x?" The answer is "it sounded fun to me if I was a kid."