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Circuit Blox™ BYO ECO Fidget Lights

Circuit Blox™ BYO ECO Fidget Lights - Main image
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$10.49 $13.99 In stock

Category: Circuit Blox

Use the hand crank to generate electricity and light the three LEDs! Learn about polarity and see what happens when you turn the crank in either direction.

• Instruction sheet included
• 7 total pieces
• Build 7 projects
• Includes three (3) LEDs - Heart (red), Star (blue),
and Blue/Red Bi-Directional
• An excellent introduction to Green Energy
• Compatible with other toy brick sets
• No batteries required!

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Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Hazel O. ★★★★★

My kids were amazed that spinning the crank could light all three LEDs without a single battery. Turning it the other way to see the polarity switch the lights off was a great little science lesson, and the whole thing is simple enough for them to use alone.

Jason ★★★★★

Cranking the handle is weirdly addictive, and reversing the direction to flip the polarity never gets old. My kid figured out the three LEDs light up faster with steady turns, not fast ones. Only 7 pieces but it's held up to daily abuse.

Abigail J. ★★★★★

I handed this to my 7-year-old and she cranked it for twenty minutes straight, fascinated that turning it the other way flips which LEDs light up. The seven pieces snap together solidly too, no loose wobble after a week of daily play.

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