This is the door of my refrigerator. I collect magnets. They are actually souvenirs from my travels. It is very easy - magnets are sold in every souvenir shop all around the world. They are small and easy to travel home with. They are fun to look at and they are useful (not just for keeping postcards and notes up, but a few of them are easy accessible bottle openers) and having them on a refrigerator means I can look at them every day and remember all the places I have visited.