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The flashing Energy Ball (UFO Ball) is a very cool device which consists of a 1.5-inch ball with two small metal electrodes. When the two electrodes are touched simultaneously, the Energy Ball flashes and makes a strange tone.
An economical alternative to other expensive electricity usage monitoring devices, Kill A Watt EZ™ can project the cost for you - by the day, week, month, or year - and includes a battery backup.
The Snap Circuits Jr. Set gives your budding engineers 30 color-coded parts with which to create over 100 of their own projects.