"Affentennis - Die Doppelerweiterung" is an add-on to the game "Affentennis". You can now play doubles. To play "Die Doppelerweiterung" you need to own the base game. Included in the extension is: One red bag which holds all the components Two monkey figures ("Äffle") Two small volley blocks Two markers one spare ball rules Two players per side play along the basic game rules, there are also some extra rules to accomdate the two extra players.