1pc RGB Optical Glass Cube Prism - Educational Toy Mixed Color Light Splitting Experiment, Science Learning

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DIY Digital Clock Module with Temp, Date & Voltage Display

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DIY Electronic Kit: Capacitance & Inductance Meter with Frequency Measurement - 51 Single-Chip Tester Circuit Board Soldering Practice

Adjustable Frequency Ferrite Audio Equipment Copiers

Laser Diode 650NM Laser Head 6MM 9MM 12MM Red Point / Line / Cross Laser Diode Laser Module 3V 4.5V 5V 3V-5V

Kinetic Art Asteroid Electric Astronomy Kit Perpetual Motion Desktop Decoration A603