Another pinner says: Mess Free Finger Painting! What an awesome idea! Paint in a ziploc bag taped over a piece of paper. Of course we'll have to REALLY finger paint sometimes, too, since getting messy is half the fun.
Rainbow Rice Garden for Play: Measure rice cups) and put it in a Ziploc bag with about of food coloring or liquid water colors (works great!) and 3 T of rubbing alcohol. mix the rice in the bags to spread the color.
Glow-in-the-dark slime! Another pinner says: glow in the dark slime UPDATE: made this and it was every bit as cool as I had hoped. Not sticky (was afraid it'd be sticky on the hands) and therefore not messy. and it glows!
An A-Z of Play Dough recipes: a whole alphabet of different flavors. Pin it for a superb reference! Use play dough to teach math, letters, fine motor skills, develop language and imagination. Lots of different flavors!