What's the weirdest thing you and/or your friends did while young?

Younger than teens (about 7-10) we used to have "private day" (I still remember, it was every Wednesday) in which we went behind the neighbors garage and showed each other our privates... we also licked each others' tongues (about the same age) just to see what it felt like... and because we thought sharing saliva would make us like sisters or something...