Since I do a lot of cooperative group activities I am always looking for innovative ways to put students into groups. This is one of the ways which really worked for me. You will need a deck of cards. Before you begin make as many groups or pairs as you will need for your activity. For example: if you need 5 groups of three, you would get out 5 sets of 3 cards which are alike (3-5's, 3-Aces, etc.). Then have each student pick a card and tell them they cannot let anyone see it. After all the cards are distributed, explain that they have to find their other group members by using only hand motions or body motions. They can't use words or show their cards to anyone. It's a blast to watch.