This hard riddle truly is a toughie, but wood might lead you to figure it out. Answer: Pencil lead. RELATED: Try on these ...

And considering you're reading this post, I'm willing to bet you're one of those really smart people who love to show off their knowledge by solving the hardest riddles! A few quick notes ...

We've got everything from easy to hard riddles ... Now that you've explored these riddles for kids, check out these short ...