Rhythmic gymnastics is a sport in which single competitors or pairs, trios or even more (generally five) manipulate one or two apparatuses: Rope, Hoop, Ball, Clubs and Ribbon. Rhythmic Gymnastics is a sport that combines elements of ballet, gymnastics, theatrical dance, and apparatus manipulation. The victor is the participant who earns the most points, as awarded by a panel of judges, for leaps, balances, pivots, flexibility, apparatus handling, and artistic effect.

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Fédération Internationale de Gymnastique
Rsg.net - the most famous Rhythmic Gymnastics site