[Making a list in her head, she disregards most of the things she does on her own. Killua's good at drawing, so arts and crafts would probably be boring, and he wouldn't get the appeal of reading books about dreamy vampires. So Mabel takes an extra long time to finish off her bit of ice cream to give herself a moment to think about the kind of things a boy would want to do.]

Well, Dipper and I went to the arcade a couple times! That was fun. [Except for when the video game characters came to life and tried to fight everybody but eh, details.] And sometimes we make up things like rolly chair races and trying to tape each other to walls and stuff. I dunno, usually we just go exploring and fun or weird things happen out of nowhere.