Arctic Flare Thinking Putty has an icy shimmer that reveals its true colors with the included blacklight keychain (in the tin). In a flash, white becomes red with an eerie fire glowing edge. This putty also glows orange in the dark for about an hour! Best played with under regular room lighting so you can see both the daytime and nighttime colors simultaneously! Hold the blacklight keychain close to the putty to draw a dark line, and move it farther away for a blurry line. What can you do with Phantoms Thinking Putty? The possibilities are endless! Each metal tin is hand packed with 1/5 lb of Thinking Putty and is made in the USA!