Relay race to build the tallest safe lego tower
In groups of 4-6 (e.g. sixes/lodges) sit at 1 end of the room. 1 person from each team runs to the other end of the hall where they pick a single piece of lego from the box, run back to their team, and add it to their tower. The tower that is the tallest and can stand on its' own at the end of a pre-determined time (e.g. 3-5 minutes) wins. Repeat the relay as many times as desired for an overall winner.
-Teams have to construct something different for each relay, such as a bridge, a car, or a house.