we prank called the boys in the other room and used "Microsoft Sam" to speak text that we typed. we made it say that they had bought adult entertainment channels and would have to pay the next day at the front desk. my friend recorded the whole thing, and then since our mentor was in room right next to us we heard one of the kids from the room go and explain to him...
the next morning heading to the competition, my mentor knew it was us and we showed him video and he was cracking up. he told us that we shoulda seen the looks on their faces, they totally fell for it. it was april fools
besides that we watched movies on laptop, went swimming, and just joked around.