High Grade Non Toxic Silicone. Just press the bubbles down and they make a slight popping sound; then flip it over and start again! Endlessly reusable and washable, too.
Original concept: A ingenious logic game in a novel format for two players 5 years old and up. 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. Push and "pop" it's a great fidget tool for hair pullers, skin pickers and other sensory seekers.
Available in many shapes and colours.
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