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.