Michael's godfather got him a Lego game called Creationary for a Christmas gift. Essentially the player pulls a card with a picture on it and tries to build that thing out of the included legos. The other players guess until they identify the object and if successful the builder and the player who guesses correctly both get a point.
Michael was super excited about the gift. Oddly enough, he hasn't played it yet though. The visit was busy, and we haven't pulled it out since we got home. However, all the adults played it. A group of 4-8 20-50 year olds played this game and had a great time for several hours two evenings in a row.
I highly recommend this game. It's an imaginative game that engages multiple generations together having a great time.