What's Missing?

What's Missing? is both the name of the game and what players are trying to figure out. To set up the game, players lay out on the table the forty objects (four each of ten different objects) in the box, and each player takes four raven tokens. While all the other players close their eyes, the active player for the round removes one object from play, hiding it in her hands under the table, for example. All of the other players then search the table to try to decipher what's missing, yelling out