How did the team get across the room ?
The number of teams depends on the amount of room you have.
Give each team 2-6 people,one sheet of paper and 7-12, two sheets of paper and 13 and up maybe divide into smaller groups. Use flipchart paper.
Give a definite starting point and ending point. A hallway works well.
Tell all the teams that they must get from the starting point to the ending point with no team member touching the floor between the points. No other rules.
Which entire team can get past the end point first? GO !