High quality by Top Trenz Toys makes a super popping sound | 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." | Simple yet wonderful; push and pop them, Poke and grab them; a perfect, portable sensory delight | This pop bubble sensory fidget toy is made of skin friendly food grade silicone, non--toxic safe material, sturdy and secure, harmless to human, very comfortable to touch | Each Fidget measures approximately 3" in diameter.f