Amazing joke gift. No need for braces, say goodbye to dental bills. Drop these in water and watch them grow. Grow to 6 times their original size. Place in a glass of water and your teeth will begin to grow after 2 hours and will reach full size in 72 hours. Your teeth will slowly shrink when removed from water, then you can grow them again and again! The ultimate joke gift, secret santa or stocking filler for adults.