Ages 7 and up. Introduce students to archaeology as they carefully chip into these blocks of special sand to uncover realistic replicas of artifacts. Wet the Mystery Matrix Clay to create sculptures with the molding tray provided. Clay can be recast again and again! Archaeologist's Guide includes easy-to-follow instructions along with facts and classroom activities. Special metal die cast artifacts include an armorial seal, coin, heraldic pendant, and an arrowhead. Sculpture molds create castle tower and gargoyle statuette.