These colorful fidgets are simple but a lot of fun. They are a large rubber dome with glitter in it. Kids push the dome inside out and either place it on a flat surface or drop it to the floor. The toy will pop back to its original dome shape causing it to pop up high into the air. This is a fun classic retro toy that never gets old. Pushing the toy inside out is great for hand strengthening, and it is also a fun game to try and catch it after it pops. Each large dome is 2″ wide x 1″ tall!