Clever colour-changing putty from the Science Museum.
This 70g pack of putty has a cool colour-changing quality. When exposed to temperatures over 22°c, it changes from striking purple to bright blue. Great for sensory play, waxy but not sticky, have fun bouncing, stretching, snapping, moulding and folding the putty. Watch as it changes colour with the heat from your hands! Produced by the Science Museum, it even comes in a handy travel tin for when play is over. Brilliant!