Leapfrog. Leapfrog is a children's game in which players vault over each other's stooped backs. Games of this sort have been called by this name since at least the late sixteenth century. The first participant rests their hands on knees and bends over, which is called giving a back. The next player places hands on the first's back and leaps over by straddling legs wide apart on each side. On landing he stoops down and a third leaps over the first and second, and the fourth over all others successively. When all the players are stooping, the last in the line begins leaping over all the others in turn. The number of participants is not fixed. The French version of this game is called saute-mouton, and the Romanian is called capra. In India it is known as Aar Ghodi Ki Par Ghodi. In Italy the game is called la cavallina. In Dutch it is called bokspringen or haasje-over. One player, acting as the goat, leaps over the back of the other player, who plays the role of the rock/mountain. Then they switch roles, and the rock rises a bit each time they switch. Both players continue playing until one goat fails leaping the rock/mountain as the result of its rising. In the Filipino culture, a similar game is called luksong baka, in which the it rests his hands on his knees and bends over, and then the other players, in succession, place their hands on the back of the it and leaps over by straddling legs wide apart on each side; whoever's legs touch any part of the body of the it becomes the next it. In the Korean and Japanese versions, one player 'leaps' over the backs of the other players who stoop close enough to form a continuous line, attempting to cause the line to collapse under the weight of the riders.