The Spinorama Card gimmick is a mechanical device which can be used to create a quick, flashy spin effect. Some Arts&Crafts materials required, (such as crazy glue, glue stick, putty, x-acto blade, hole punch) - plus some other inexpensive stuff. The gimmick has to be constructed. Best-suited for crafty builder types who enjoy mechanical projects.
Some cutting with a utility knife would require adult supervision
The principle can be adapted to make other things spin, such as a box of crayons, a DVD, a matchbox, etc.