- Demonstrate the Laws of Thermodynamics - This brass ball fits easily through the matching ring when they are both at room temperature. Heat the ball in a flame, and it expands so that it no longer fits through. Challenge your students to predict what will happen if you heat the ring instead!
- Hint: Think about enlarging a photograph.
- ⚠ Products being sold are not toys. They are for Educational / Laboratory use only. They are not for use by children 12 and under.