From Scrap

• Neodymium magnet from a hard drive.
  
  If you've an old computer around, you have neodymium magnets whether you knew it or not. Before taking the computer to be recycled, take it apart and pull hard the hard drive. If you deconstruct the hard drive, you'll find a large magnet like the one pictured here. In all likelihood that's a neodymium magnet, ready to be played with. Not sure if it's a magnet or not? Put some metal near it; you'll find out quickly.
  
  

Online

• A number of online marketplaces offer neodymium magnets for hobbyists. Think Geek, for example, sells Curiously Strong Magnets, a small set of magnets that still demonstrate well the power of neodymium. Another interesting set it offers is called Bucky Balls, consisting of a series of marble-sized neodymium balls that stick together in interesting ways. Amazon and eBay are also excellent places to check out for neodymium magnets, offering many different shapes and sizes.
  
  

Local Shops

• Prefer to shop locally? Ask around at stores near you. Some hobby shops carry neodymium magnets, perhaps referring to them as "rare-earth magnets." Get out the phone book, call up some stores and see if they carry rare-earth or neodymium magnets.