Rummikub is a tile-based game for two to four players, combines elements of the card game rummy and mahjong.
A retainer is a simple device that helps to correct your bite, as well as sometimes address other conditions. You may have seen people wearing a retainer before, but they are not all that noticeable. A retainer is a small device that is made out of clear plastic, rubber, or even metal. They are custom-made so that they only fit your teeth. They are part of a treatment plan that has likely been determined by an orthodontist.
The retainer method. Some people can get a way with just wearing a retainer to straighten their teeth. Retainers are metal and vary a lot in how large they are (everyone has a different sized mouth and different teeth retaining needs). You'll have to discuss how a retainer would work for your teeth with your dentist.