This set of 20 different LEDs each has a battery and a magnet attached. Pull the tab to activate, then place them on any magnet surface. They stick and glow brightly to let everyone know you were there, like a “Kilroy was here” message of the 21st century.

Product Features:

• Decorate your world with LED Graffiti that light up and stick to metal surfaces
• Each package includes 20 different LEDs:
• 4 x 10mm Red
• 4 x 10mm Blue
• 4 x 10mm Green
• 4 x 10mm Orange
• 4 x 5mm Rainbow Cycling
• Pull tab to activate. No on/off switch
• LED battery life is approximately 48 hours
• This is not a Toy. Not for children of any age

The LED Magnetic Digital Graffiti set is availiable from the ThinkGeek website for $9.99.