Also called " Tiki-Taka " or " Tronadora " it is a skill toy with two spheres tied to a string, equidistant to the ring that serves to hold them with one hand. It makes them is hit and bounce between them repeatedly with a back and forth motion, using centrifugal force. In slang, is a form of name to the testicles.
Gameplay in football that put Cruiff and Guardiola on the Barcelona fashion and also the selection Spanish years ago consisting of the mobility of the ball so that retained it any player they passed it to the first touch a teammate in triangle with what dizzy to the opponents who could not be with her.
