I noticed most of my young players were running around the bases in almost a perfect square, trying to pivot on each base. While this might be the shortest distance between two points, its definitely not the fastest! I take 8 cones and placed them between the bases in an arc and had them run around them. At first base, I place two just before the base, showing them where to 'flare' before rounding for second. I place two equidistant between first and second and second and third in an arc. I place one cone wide of third and one back on the base path halfway between third and home to get them back to the plate in as straight a line as possible.