The Puzzle Activity

This lesson enables students to identify key components of successful and unsuccessful teams and develop a plan for forming a work team.

Teambuilding Activities

A very nice collection of team-building activities, initiative games, and problem-solving activities.

The Marshmallow Challenge

The Marshmallow Challenge is a remarkably fun and instructive design exercise that encourages teams to experience simple but profound lessons in collaboration, innovation and creativity.  This video from the TED conference has great info on it, and step-by-step instructions can be found on the marshmallow challenge website.