🧲 Drag a magnet around. The glowing lines show its invisible magnetic field.
🔴 Red is the North pole, 🔵 blue is South. Opposite poles pull together, the same poles push apart.
🧭 The compass needle always turns to point along the field.
✨ The tiny iron filings line up with the field, just like real ones do!
🔌 The coil is an electromagnet. Slide the current up to make it stronger, slide it the other way to flip its poles, or set it to zero to turn the magnetism off!