What on Earth??

When I was a kid, the science magazine at the library (Was it called World? I can't remember.) always had a fun set of photos on the back page. Each one was a close-up on some kind of animal or something you might have around the house. You looked at the photos and tried to figure out what on earth the close-ups could be showing you.

Here's something like that -- a new item that we're selling at Castle in the Air. Can you guess what it is? The answer comes tomorrow!