Physics fundamentals become playtime fun with the Pendulonium STEM Challenge. This hands-on activity set challenges kids to send the included launch balls flying toward goal cups and targets with the help of a three-piece adjustable pendulum. What seems like a collection of simple tasks actually challenges each child's engineering, problem solving, and critical thinking skills as they explore early physics concepts such as force and momentum. The pendulum is completely kid-powered, with no batteries, springs, or rubber bands needed. Each set comes with a full-colour booklet filled with easy-to-build challenges. Size: 25.4 x 25.7 x 7.9 cm. Ages 6+.