You have the kids all stand in a circle and hold hands. They then walk and rotate the circle, still holding hands. The counselor stands in the middle and randomly points to a camper and tells that camper they are out. When the last person is standing, you make a really big deal over them and congratulate them and everything. The kids will just naturally start guessing as to why they are out, and that becomes a game in itself. When the kids finally get tired of it, and give up, you tell them it was ÛÏfibanacci’s SequenceÛ, 1, 1, 2, 3, 5, 8, 13, 21, etc…. 99% of the kids wont get it, and the one that does will agree with you so they sounds smart.