Secret friend (also known as Angel)
Every participant takes a piece of paper on which the name of his/her secret friend is written. You keep this in secret as your secret friend does. You can use the time of the course to make nice things for this person like prepare a hand-made present, write something nice and hide it under the pillow, and so on.
Variation: Every person could write his/her name on a postcard slip and attach it to a wall. Throughout the whole period of the course you could receive surprises from the other participants in it or you can do the same for others.
Create a spider’s web between two trees or posts using a rope. All the people need to pass to the other side without touching the rope with their bodies. After one hole is used it cannot be entered again. The game ends when everybody is on the other side.