Another common problem we all have these days is knowing what to do with all those blown woofers lying around the house. (The ones from the speaker cabinets we've used for cat castles.)
I haven't quite figured out what to do with the metal rings. But there are lots of fun things to do with the magnets after you pry them off.
For example, they make a convenient device for storing a screwdriver with multiple bits on your fridge.
Added bonus: Sculpt the bits into different shapes while you wait for your spaghetti water to boil.