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• Amazing Electric Top •Build Your Own Scientific Spinning Top •Learn the PHYSICS OF ROTATION law •Press N Spin to the Target •Requires 1 x "AA" battery， not included Printed Box Size: 14.0 x 19.0 x 7.0cm Actual product size (approx): 14 x 20 x 16cm Product Weight: 0.82KG Recommended Age: 8+