Ubongo is a tetris like puzzle game. After the dice has been rolled, and the pieces chosen, each player races to t their tetris like pieces into their own different shaped board before the other players. If you are fastest you get to take two different coloured gems from the board, and the other players only one. By collecting different coloured gems you collect points. This is a good multi player with a personal challenge element as well.
In Ubongo, players compete to solve individual puzzles as quickly as they can to get first crack at the gems on hand for the taking.