Krypton Glow in the Dark Thinking Putty is hypnotic and irresistible! Milky white in daylight, the glow magically appears when the lights dim. After exposure to light (the brighter, the better), it will glow for hours.
Each metal tin is hand packed with 1/5 lb of Krypton Glow in the Dark Thinking Putty, much more than you get in a plastic egg! Black light key chain light show in video not included. Made in the USA.