Made of silica gel material. Non-toxic and no odor. Great sensory tool you fidget with again and again. Slight popping sound after you press the mouse bubbles down, then flip it over and start again. Endlessly reusable and washable. Players take turns pressing down. 10 Bubbles with keychain. 3.15" x 2.76" x 0.59". Shipping cost charged additionally.
