Do it at the beginning of the training When you want to start with something new and introduce them at the same time. In the envelops you will give them instructions what to do. For instance you could give them puzzles which are mixed in different envelops. So each person will have to check his parts of puzzle with other participants. During that conversation they will meet and introduce each other. On every training you meet people. Some you never think about again. Some, you wonder what happened to them. There are some that you wonder if they ever think about you. And then there are some you wish you never had to think about again. But you do.
Now, questions for you:
1. What else could you find in the envelops?
2. How could you meet other people in different way?
3. Who are the people that you remember?
Thank you for your work!