I dropped into my local Learning Express yesterday, and saw this; they say they are one of very few retailers that have it. Comes from France. It's a credit-card-sized rectangle of thin plastic film shaped like a tray, which spins when you push it through the air, balanced on your finger.
They are fragile so they come in a 3-pack. I think they were $5. There seem to be lots of videos of them on YouTube.
Victoria, TX has a large public library that serves 60,000 people in Victoria and the surrounding area. They were nice enough to bring me out for a kickoff of their summer program. I did four shows in the summer heat last Monday June 8, and was very glad they had a tent. Also, they had free snow cones, which is something I recommend for all future shows. Really helps bring in the audience. :)
This show involved a road trip ... it was a 2.5h drive for me to get to Victoria to do this one.
Here's a list of the Texas libraries I've performed at:
Austin Public Library, five different branch locations