4 years & up. Looking for an easy and fun kid's science kit? Steve Spangler's Oobleck is a special mixture of powders created to replicate quicksand. Children of all ages will find hours of fun and learning with Oobleck. Simply adding water turns the powder into a liquid and a solid depending on the force used to move the matter. Easy clean up plus, it doesn't stain your hands. Oobleck is safe, non-toxic and can be dried out and reused time and time again to keep the imagination and learning going. Includes 6 packages of Oobleck, 16 oz each, 6 LED black lights (1 per package) and 6 full-color, laminated science experiment cards (1 per package). Colors included: yellow, orange, pink, blue, green, and white.