Have you considered making homemade non-toxic clay for your kids? Children love molding and shaping clay into their own sculpture creations. Children's fingers tend to end up in their mouths. Making your own homemade non-toxic modeling play clay insures kid's safety while they create. All these clays can be stored in Tupperware or baggies in the fridge for several days. I always read "Bartholmew and the Oobleck" when making clay. Recipes come courtesy of my friend Jaipi). How to make homemade non-toxic kids clay