Just add water, snap the lid shut and stand back. Attach the foam rocket to the snap can and shoot the rocket high into the air. The bubbling action of the chemical reaction builds up pressure inside the can until the top POPS and flies through the air.
The students in Mr. Kane's second grade class at Wilder Elementary learned about eco-friendly materials and how they can help us all go green. Mix two chemicals together and wait for the reaction. The chemicals produce a polymer called polyurethane foam. Polyfoam has a high R value and is used in furniture, packaging, insulation and floatation devices. Homebuilders spray the polyurethane [...]