Large tins w/ 3.2 oz of putty come with a black light keychain packed separately in the tin. This version of Crazy Aarons Thinking Putty is UV reactive! It appears to be a pale, sparkly, glow-in-the-dark, but you can actually use the light to draw on the putty and it changes color! Not just a little change either! Foxfire becomes bright blue, Arctic Flare becomes a bright magenta and Mystic Glacier changes to a deep purple. After a few minutes, the color fades away like a phantom. Take your putty out into the sun for a more dramatic change. Break it apart and see the original color inside. The putty levels itself in the container for a flat drawing surface. The putty itself is nice and stretchy with a very fine iridescent glitter. If you have any of the glow-in-the-dark putties already, theincluded Glow Chargerwill really make them glow! ~ Sara

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