Made of silicone, comfortable touch, endlessly reusable and washable, too. Just press the mouse bubbles down and they make a slight popping sound; then flip it over and start again! These push pop bubble toys have a discrete pop sound. It is not comparable to bubble wrap in sound but is also just as fun to pop. Use a fine motor game, players take turns pressing down any number of mice they wish in a single row. The player who presses down the last mouse loses. You can use it to relieve stress, or give your child good gift and product!