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Thermal Thinking Putty - Changes Colour

thermal sensitive putty in its tin

thermal sensitive putty in its tin     

This Heat Sensitive Hypercolors really make their mark! Thermal Thinking Putty is thermochromic -- just a touch from your hands or a warm coffee mug will reveal a new "hot" color. Allow it to cool off or stick it in the fridge! Then the "cool" color will be restored.

Each metal tin is hand packed with 1/5 lb (90 grams) of Thinking Putty.

Price: £10.99 in

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Ideal for ages 14+.
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