Speed, reasoning and reactions are vital when playing Ligretto. Everyone plays at the same time, attempting to discard as many cards as possible to the communal piles in ascending order. One box allows you to play with 2-4 players.  Add a second different colour box and up to eight can play, add the third and now twelve players can compete. Easy to learn, this fun game is played at breakneck speed.

It's based on the card game Racing Demons
Everyone plays at the same time, so no waiting for your turn
The twelve player game probably counts towards government guidelines for exercise as you dash round the table!