Playing Marbles -For a den tournament, draw a circle on the bare ground 5 to 10 feet in diameter. Make a cross of 13 marbles in the center as shown above. Boys take turns shooting at the marbles with their shooter, trying to knock them out of the ring. If they knock a marble out of the ring, they shoot again. The right way to shoot is shown above. The player who first shoots seven marbles out of the ring wins. If his shooter goes outside the ring, he may shoot from any place outside the ring. For more tips on marbles