Sure, and I happen to be teaching about them in Earth and Space Science class.

A couple of weeks ago, we tasked the (10th grade) students with designing their ideal planet. Each foursome had a big chart paper and markers. One group discovered there was a hole between the desks the paper was on, so the marker went through and made a hole in the paper. In their presentation, they said that their ideal planet has black holes built in ... for garbage disposal.

These kids crack me up. Today, one of them said something that's not fit for a family web site but it was, at the same time, heartening.