They so want to be together that you will have a hard time keeping them apart. Rare Earth magnets are so strong that you can even hang a planter from your window on them. We blogged them last winter as the best thing to use with magnetic paint, but you don't need to stop there.
Properly known as rare earth neodymium-iron-boron (NdFeB) magnets, these suckers are small, smoothly shaped, come in various sizes and can be used to pin things, hold things together or connect pieces of furniture or cabinetry together. They make great gifts too, because they are just plain fun to play with. We find them at Rare-earth-magnets.com and Emovendo.