Tricks from this video: <br />1. Homemade compass. For this trick you need needle, piece of cork, magnet, plate and some water. You need to magnetize a needle and put it on the cork which floating in the plate with water. The needle show you South and North. <br /> <br />2. Simple speaker. For this trick you need copper wire d 0.2-0.3 mm, magnet and tape. Follow the instruction and coonect the ends of the wire to your mobile phone or mp3 player. <br /> <br />3. Electric magnet. For this trick you need battery, copper wire and nail. Instruction is quite simple: wrap the nail with the wire and connect the ends of the wire to the battery. That's all :) <br /> <br />4. Simplest homopolar motor. You need battery, aluminium foil and 2 neodium magnets. Connetc opposite poles magnets to the battery and put it on the foil. Your motor starts rotate. <br /> <br />5. Perfect geometry. You need 7 same magnets, 7 coca cola caps, plate and water. Stick magnets to the caps. Fill the plate with water and put caps very carefully one by one. You will see the perfect geometry!
