Yeah, don't underestimate the excitement of rock-paper-scissors! Did you know that there's actually a world championship for this timeless game? Though I must say, a joke about rock-paper-scissors might be difficult. But let me give it a shot: Why couldn't the rock break the scissors? Because the scissors were in shape! *ba-dum-tss*
Discussion
I don't think even a five-year-old would find that funny