Concentration (game) as an educational game. Any deck of playing cards may be used, although there are also commercial sets of cards with images. The rules given here are for a standard deck of 52 cards, which are normally laid face down in four rows of 13 cards each. The two jokers may be included for a total of six rows of nine cards each. Additional packs can be used for added interest. Standard rules need not be followed: the cards can be spread out anywhere, such as all around a room. In turn, each player chooses two cards and turns them
The Cosmic Jokers The Cosmic Jokers The Cosmic Jokers were a German krautrock supergroup, and a primary example of space rock. The Cosmic Jokers was never an ensemble, per se; its members did not play together as Cosmic Jokers, and in fact were not even asked to join the group. Their music was created from sessions put together by Rolf-Ulrich Kaiser and Gille Lettman in early 1973. He arranged for several acid parties to be held at the sound studio owned by Dieter Dierks, where musicians were offered drugs in exchange for recording tracks. Participants included Manuel Göttsching and Klaus Schulze of Ash