This was the toy I got for both Kristine and Kaelynn the other day. I think its a frisbee but it seemed to heavy to fly. But when I am free, I think I will play with the girls. The reason I got this was because right in the middle of the disc, there is an optical illusion. Sonic the Hedgehog seemed to be "floating" above the saucer.
I have seen this trick when I was in Singapore years ago. I was in some kind of a science centre and there was this round bowl with a small opening at the top. It was brightly lit and inside the bowl, it had a mirror-like surface. So, anything inside the bowl would see to be floating on top at the opening. Sort of like a 3D image.