This is a great tool to be used for reviewing or even group discussions. You can use a stick or a bean bag (or almost any other distinctive object).
Place the talking stick in the centre of the group. Pose a question to the group, when a participants has something to say on the subject they then take it from the centre, share their thoughts with the rest of the group and return it to the middle. Only the person holding the talking stick is permitted to speak (you can set a time limit if necessary).
This tool allows people to consider and take their time in voicing their views as they don’t have to be afraid that someone else might jump in. It also makes people conscious of when they interrupt others and helps them to break the habit.