Genius Putty Unicorn UV Reactive

Unicorn UV Genius Putty that changes colour when exposed to ultraviolet light.

Unicorn themed tin of UV sensitive putty that changes colour when you shine ultraviolet light on it. Mould, stretch, bounce and even watch this putty melt as you play with it. The light from the UV torch included with the set causes the putty to change colour, only reverting back to its original shade when it is left in regular light. Supplied in an assortment of colours.