My students like doing Class vs Teacher boggle. Will introduce the game and get them to play against each other solo or in groups first. Then draw a grid on the board and let them choose letters, or generate a random grid onlin (google free online boggle). Copy down the grid onto a sheet of paper and go and sit where you can't see the board/face away from it. The students have to work together as a class, writing words up on the board and compete against you. They should really get into it and they'll be really impressed when you write your list up afterwards and pull out some random words they've never heard before. Not reccomended for teachers with a limited vocabulary/who are bad at boggle, personally I wouldn't be doing it if I wasn't pretty much guaranteed to win.(letting them choose letters just makes sure they know you're not cheating and makes them think they're in with a shot)