Here is a super easy project that is a tactile delight for children: sand pictures. All you need is colored sand, glue and paper! I found this great idea here when planning our newest after-school club, "Expedition in the Desert!".
To make the colored sand, I used this recipe. You simply mix food coloring and a little water into sand and let it dry out. In Germany, the food coloring is a gel rather than the liquid that one finds in the States. The gel doesn't work at all, so we had to go to a hobby store to find powdered food coloring (pictured). It then worked fine with a little water.