【Electromagnetic Eddy Currents Egg Principle】Experience the magic of electromagnetic induction with our Electromagnetic Eddy Currents Egg! It rotates and stands upright under a rotating magnetic field, vividly demonstrating eddy currents and motion interaction, perfect for physics experiments and coil demonstrations. 【Switchable Rotation Direction】Supports forward and reverse motor control, allowing users to observe how alternating current creates a rotating magnetic field. 【Premium Acrylic Base】Featuring a concave, crystal-clear acrylic tray, this Columbus Egg spins smoothly and visibly.Ensures effortless observation of DC motor induction phenomena. 【Durable Industrial Construction】 Built with precision winding, reinforced metal bolts, and a sturdy frame, our Electromagnetic Eddy Currents Egg withstands repeated lab use. Robust enough. 【Educational Physics Teaching Model】Perfect for explaining the principles of rotating magnetic fields and asynchronous motors. An invaluable resource for educators, and enthusiasts, it transforms complex principles into engaging gifts for science demonstrations.