NdFeB magnets are commonly referred to as neodymium or rare earth magnets. They are very powerful, with a magnetic force 10 times greater than ferrite magnets and 20,000 times greater than the Earth's magnetic field. These magnets are both fragile and strong, and are easily broken. If proper care is taken when handling them, they can be used for many beneficial and creative uses.
Invisible tool rack
Put a 1/2 inch diameter neodymium magnet in your pocket, it can be used as a tool holder. Any tool with a metal handle or metal shaft will be fixed to your pants by a magnet. If you don’t want to risk tearing your pants, glue the button-sized magnet inside the belt and make a magnetic tool belt. You can also make a magnetic tool rack for your studio by drilling a magnetic hole in the back of a piece of wood, inserting a magnet in the hole, and then hanging the wood on the wall so that the magnet is hidden. Even if you can't see them, they will still strongly attract metals.
Magnetic sculpture
If you have a collection of neodymium magnets, use your creativity and build a dreamy structure that seems to be able to fight gravity. For example, build a vertical wooden frame, embed a magnet in the horizontal bar at the top, and then glue the other magnet to the rope at the bottom. The magnet on the rope will be attracted by the magnet on the top, which looks like it is hanging in the air. Use magnets of different sizes and shapes to approach your inner artist.
Test Lenz's Law
Slide the neodymium magnet along a non-magnetic conductive surface (such as copper) and you will notice that the magnet will resist movement, even if it is not attracted to the metal. This is because the moving magnetic field creates an electric field in the conductive material, and this electric field is opposite to the magnetic field. This effect is called Lenz's law.
Reject grapes
Put two grapes at the end of a straw and use a pin to fix the straw to a plastic bottle cap. Move the neodymium magnet next to the grape and it will move away from the magnet. Then, turn the magnet over. Although you think grapes will be attracted, it will be rejected. This is because the water in the grapes is bimagnetic and repelled by the poles of the magnet.
Making a magneto
Put an old CD on a rotating shaft, so that it can rotate freely, and then stick a small neodymium magnet on it, so that a magnetic pole is on the edge, facing outward. Move the other neodymium magnet close enough to allow the magnets to repel each other and the CD will turn. If you can find a way to synchronize the movement of free magnets and keep the CD rotating, you can completely change the energy industry.