Give kids a fast and friendly introduction to speed, angles, and distances with the hands-on learning challenges of the Wacky Wheels STEM Challenge set. This physics-inspired activity set gives kids a seemingly simple goal—send the included launch balls rolling up ramps, over obstacles, through a target hoop, and into the goal cup. Kids use trial-and-error play as they tweak the course setups, launch speeds, and other variables. The paddlewheel launcher operates without batteries, rubber bands, or springs, giving kids hands-on lessons in force. This set includes a full-colour booklet filled with challenges both simple and complex. Size: 25.4 x 25.7 x 11.4 cm. Ages 6+.