“It starts with each of them, in two teams, running on their hands and feet, forward and backwards, around markers on the floor, amid shouts of ‘Three, two, one! Touch! Touch! Touch!’ in an atmosphere that brings to mind a fun but extreme school sport’s day race. … The one-hour class continues to build up in terms of strength and energy levels, culminating in a session involving leaping over bars onto a mattress on the floor, with some kids flying over with gloriously wild abandon, even throwing in the odd fancy forward roll. By the end of the class, I see that even my daughters are managing to jump, efforts that lead to hot, happy and exhilarated smiles.”