Wikipedia
Minibridge is a simplified form of the complex card game Contract Bridge designed to expose newcomers to declarer and defensive playing techniques without the burden of learning a detailed bridge bidding system. The game was first introduced in France and the Netherlands in the 1990s. The variant described in this article is the one advertised by the English Bridge Union for use in primary schools as a way to improve pupils' performance in mathematics.
Like other forms of bridge, Minibridge is played by four players in fixed partnerships, sitting crosswise. A full pack of 52 cards is dealt to the players, each receiving 13 cards. As in contract bridge, it is then decided which player becomes declarer, but a key innovation of Minibridge is that this decision is taken out of the players' hands. Declarer's partner then lays open their hand, and declarer announces a contract. This is a trump suit or no trumps, together with an undertaking to win more than half the tricks (partscore) or even to win 100 trick points or more (game). The remainder of the game is very similar to contract bridge. In particular, declarer's partner becomes dummy (i.e., declarer plays both hands).