This 4-in-1 set makes a perfect gift. Use all at once or save some for rainy days with individually packaged projects. Kids can explore engineering with the Dynamo Torch project by powering a light bulb with hand motion. Use the power of air pressure to launch recycled materials up to 80ft high with Green Rocket. Make homemade cheese, a bouncy ball, and experience dilation with the 3-in-1 Chemie Starter Set. Stimulate an erupting volcano and unleash the power of earth science with Volcano Eruption. The set is made with safe materials that meet U.S. Federal Safety standards and is ASTM F963-17 and CPSIA certified, making this a safe and fun option for playtime!