A blue moon is an extra full moon that occurs in a month or season. Known to herald rare or magical events, this lunar phenomenon has captured curiosity for centuries. Experience a similar marvel with Blue Moon Thinking Putty. Pale yellow by day, the included Glow Charger reveals a deep teal hue that changes to a bright sky blue glow in the dark. Each tin includes 1/5 lb of Blue Moon Thinking Putty - a huge handful for tons of fun - and a Glow Charger.