Keys ( short speaking activity )
I use this activity with small groups of teenagers or adults when I have some time to kill at the start or end of class. Ask everybody to take out their keys and then each student describes them. This key is for the house, my car, etc, etc. Most people have one or more key rings as well. Students can explain where they got it, is it a present, how long they have had it, etc, etc. Questions like When did you get your first key? Have you ever lost or found keys?
Basically 5 to 10 minutes to kill some time in class with no preparation needed.