"Riddle me this, riddle me that, what eats bamboo and looks like a cat?" A bamboo-eating cat of course! If you didn't get that one, then you're seriously going to struggle with these hard riddles. Riddles are not only for Sphynxes, guarding the Pyramids but also for humans, who love brain teasers. Also, they are a great way to silence your kids for a couple of hours, if you have them.