Laura, they just stick on like the stick-on earrings; and you can just lift them up when you are ready to peel them off (tweezers help with getting them on straight). Like the earrings, you can use them and re-use them. I have never had a problem with tooth paint peeling off; and I have left them on for up to a month. They come in cute little colors - silver, red, blue, and green; and the pack comes with 3 sheets of 8 braces on each sheet. My GT21 (Margie) has worn them the most at my house, and she looks adorable with braces on!