Art can express a variety of human feelings, from joy at the birth of a child to confusion at the birth of a man-child. Eloquently articulate your emotions with today's Groupon: for $15, you get $30 worth of arts-and-crafts materials online at Activa.

Activa purveys nontoxic, kid-friendly tools for papier-mâché and clay sculptures, sand art, and other hands-on art projects. Mixed with water, a chunk of gray or white Celluclay instant papier-mâché ($9.90–$10.30/1 lb. package) becomes smooth and supple so nimble fingers can shape it into a lifelike Joyce DeWitt mask before setting it out to air-dry in time for the next Three's Company–themed dinner party. Celluclay is made from recycled paper and can be stored for several days in the refrigerator next to Jello molds shaped like the duchy of Liechtenstein.

Nascent Picassos can also sink creative claws into lumps of Activ-Clay air-drying modeling clay ($9.50/1 lb. package) or arrange the colored grains of a Sand Scenes art kit ($9.50) to produce a brightly hued scene set in a jungle, outer space, or a medieval speakeasy run by tommy-gun-toting dragons.