Split your group into teams of 4-5 people.
The goal of this game is to build a "carriage" or container to help cushion a falling, uncooked egg so it lands from a 2-3 story drop without breaking.
Provide teams with access to a variety of supplies - rubber bands, paper, straws, tape, and balloons. You can optionally provide multiple eggs to 'test' their design; however sometimes it adds to the suspense if no testing is allowed.
Set them a time limit to build the designs (between 30-90 minutes), then everyone should assemble for the drops.
In the event of a tie, increase the height of the drop and see which team emerges the winner.