"Why, you get squirted, of course," said Luna, matter-of-factly. "And you lose whatever stones you played, like in Muggle Gobstones. Sit, Fido. Good dog. (http://community.livejournal.com/neutral_omens/135341.html?thread=2903725#t2903725) I used to have a set - I got it from a Christmas cracker - but I think Dad gave them away because I didn't play very much."