We have been saving bottle caps for the unknown art project that we knew would come up one day. Today was that day. Grayson (my 2 year old) is fascinated with magnets. He could play with them all day long. I don't know what it is about magnets.
P.S. Here is a tip I learned from my very handy sis-in-law, Sally. It was one of those "Duh!" moments for me, so I will share it. Got a real stainless fridge that won't let your magnets stick? Move your magnet play to the washer and dryer!