United Scientific Supplies ENRGYBALLS Energy Ball Science Experiment Kit Lights Up and Makes Sound, Demonstrates Circuits and Conductivity

This pair of steel balls demonstrates energy transformation. By striking the two balls together with a piece of paper between them, kinetic energy is transformed into work which creates thermal energy. This thermal energy creates a small burn hole in the paper. There is no flame but there will be a smell of burning paper. Each ball weighs 224 grams (0.49 lbs) and has a diameter of 40 mm (1.5"). Includes activity guide.

Features:

• Easily demonstrate energy transformation
• Safely burns a hole with no flame
• Includes activity guide