Doppler Effect Demonstration Apparatus, 92dB buzzer, 0.8m tether. Nylon cord is 2ft 8in attached to a rugged ABS handle 8.5in long, (1in diameter), Swing the apparatus and students will be able to hear the change in frequency, Dimensions: 4.5 x 5 x 3 in
Solar Balloon, This 50 foot long by 29in diameter Solar Balloon, 400 feet of string, complete instructions and science learning guide balloon, Demonstrates buoyancy, convection, thermodynamics and solar power, Teaches Bernoullis Principle and Pascals Principle, For ages 14 plus
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