This is a tutorial on how to make an air canon using a balloon and water bottle. You can see how air flies out of the bottle as a vortex by watching the smoke ring that comes out. It is an awesome air canon smoke ring science experiment to show your kid!
How to Grow Your Own Crystal Geodes - Cool Science Experiment for Kids
Come learn an easy trick that will get you the most dramatic, puffy, foamy baking soda and vinegar eruptions and learn the science behind it! From Fun at Home with Kids. Baking soda and vinegar mixed with a tough of soap.