I made kinetic sand and it turned out great. 10 cups of sifted play sand which costs $3.50 for a 50 lb bag at Home Depot). Add 5 cups (about a 1 lb box ) of corn starch of a store brand which is under $2.00. Mix well, then add 1 cup of water, or a little more until you get the right consistency to make it stick together without being wet. Keep in a sealed box. If it dries out, simply add water.
This DIY recipe for Kinetic Sand only takes 3 ingredients, and costs about a third of what commercial brands of Kinetic Sand retails for. Kids love sensory play like this, and will occupy them for hours. See how to make your own Kinetic Sand here! LivingIthaca.com: