Folly

Folly is when someone does something that doesn't make sense or is silly. Imagine if you were playing with blocks and you built a tower so tall that it fell over and knocked all your other blocks down. That would be a folly because you didn't think about how high you were making it and you didn't consider that it might fall over. Follies can happen when people don't use their brains and make a bad decision. It's like doing something that you know is not a good idea, but you do it anyway. So it's important to always think things through and make good choices.