Crazy Aaron's Thinking Putty "Candy Cane" Hypercolor & "White Christmas" Glow in the Dark Holiday Gift Set Bundle - 2 Pack (Limited Edition) Christmas Gift Set of 2 Thinking Putties - 1 "Candy Cane" Hypercolor & 1 "White Christmas" Glow in the Dark! Hypercolor 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. Glow in the Dark Thinking Putty is hypnotic and irresistible! Milky white in daylight, their glow magically appears when the lights dim. - Blacklight Included! Made in the USA of non-toxic silicone, never dries out & is easily removed from solid surfaces Gluten free, latex free and amazing for Christmas gifts, stocking stuffers, special needs, gifts & much more!