You rock! You rule! I SO want this on a T-Shirt! (Add it to my list, right after the one featuring a picture of a toilet and the caption 'Potty Like a Rock Star' - hey, it may be juvenile but what can you expect from a preschool teacher?
Rock-paper-scissors - a hand game played by two or more people, where players simultaneously form one of three shapes with an outstretched hand. The "rock" beats scissors, the "scissors" beat paper and the "paper" beats rock.