Radiometer The Radiometer - A Real Solar Engine!$12.95 OMSI Gyroscope $6.95 Physics Discovery Kit Introduction to mechanical physics. Ages 8 and up.$29.95 Physics Solar Workshop Solar power technology in action. Ages 8 and up 64-page Manual 30 Experiments$59.95 Physics Workshop Force = mass x acceleration — and factor in the fun.$54.95 Physics Pro Our biggest, most advanced physics kit. Ages 8+$99.95 H-Racer Hydrogen Car Welcome to the Hydrogen Age!$124.95 Motor-Works™ Build your own working engine!$31.95 Buzz Magnets Make noises that are out of this world!$3.95