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Easy as 1,2,3, blast off! This 4M Kidz Labs Micro Rocket Launcher offers kids quick and easy science experimentation that, hopefully, will spark a larger interest in how things work and what else they can do with science. That's what we love about Toysmith 4M kits, they offer accessible science that is fun. Fill the launcher with vinegar and baking soda, slip in the foam rocket and watch the chemical reaction send it into space!