The Phantoms have a magic all their own as they react with vibrant colors to UV light. Using the included blacklight keychain, you can actually draw and decorate the putty! Each tin is hand packed with 1/5lb of Thinking Putty - One blacklight keychain is also included in the tin. Made in the USA! Foxfire is a shimmery glitter Thinking Putty that reveals its true colors with the included blacklight keychain (in the tin). In a flash, mint green becomes dark blue with an eerie glowing edge. In the dark it glows brightly for over 12 hours. 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.