You're wondering through the fabric/hobby store, shuffling down the aisle of a thrift store/antique store, trolling the internet or at a garage sale and you see them. They're cute, fun and make you smile. They're buttons.
They come in all shapes, sizes and colours. You can buy them new or used and they never go out of style. Eventually, you might even find the perfect thing to put them on but until that day, they'll sit in your craft room putting a smile on your face.