4A Thermal Properties of Matter

Spencer Disk (Hopping Disk)

Catalog: 
4A30.40
Location: 
Bimetal disk are heated in your hand and then "cocked". When the disk is set on a cool hard surface, heat is transfered from the disk causing it to snap back into it's origianl position and hopping off the surface.

Liquid Crystal Sheets

Catalog: 
4A10.50
Location: 
Heat sensitive sheets change colors depending on the temperature. Our sheets are sensitive to temperatures between 23deg C and 27deg C.