Fingertip Gyro Sprocket 16 Precision Parts Kit Color:Silver This photochromic lens depends on

This photochromic lens depends on the intensity of sunlight and ultraviolet rays to change the color of the lens and protect you from the sun's rays

Educational Toys: Educational toys that are entertaining and entertaining can not only provide children with fun and fun

5V AAA (not included)

You will never stumble in the dark again

It is a convenient

Fingertip Gyro Sprocket 16 Precision Parts Kit Color:Silver This photochromic lens depends onStay focused, reduce stress, release inner creativity and imagination. 16 precision parts, enjoy the fun of DIY with children! Easy To Carry, Small, Simple, Discrete and Fun, also effective for Focus and Deep Thought. Perfect Hand Spinners gifts and size suitable for Adults and kids. Ergonomic curved shape design for hand comfort and long term usage. Simply flick and spin for hours with one or two hands. Parameter: Size: 36x60mm Material: Stainless