Your guide to activities and fun things to do with your preschoolers, toddlers and kids in Portland, OR

I know my six-year-old knows about sex. He's sure that, when two people get somewhat naked and start kissing, that's sex. (Pretty much the way every sex scene on TV has ever gone, hmmm? We've instituted a "no more adult TV shows while children are awake" ban in my house.) We'll explain to him in time, but it's not really him I'm worried about -- it's my three-year-old, who occasionally overhears us having to backtrack with the older one. "No, sweetie, 'sexual' doesn't mean what you think it means!" I have to say after a misheard conversation about a woman who described herself as "bisexual."

What do you tell your three-year-old about sex? I'm still not sure, but there are a few books that consider the topic of sperm and egg and, after exhaustive research (hours at Powell's children's reading room on Hawthorne while pregnant with Truman and wanting to explain birth to Everett) I have found the one and only funny book that doesn't make me squeamish: Where Willy Went. It's the tale of a sperm who liked to swim, but wasn't very good at math, and gives you just enough anatomy to answer questions and not enough to get them too far ahead of themselves in the preschool conversations.