Players spread out along one end line of your practice area, each with their own ball. Start with one player, without a ball, who is the "Crab". The Crab starts out 10-15 yards or so in front of the rest of your team, in a "Crab Crawl" position (facing up with bottom off the ground, using feet and hands to crawl around). The goal is for your players to dribble from one end line to the other, without getting their ball stolen by the Crab. Depending upon age, you can choose to allow the Crab to steal the ball with their hands or feet.

I recommend that cones or discs be used to set side boundaries as well, with the end lines approximately 20-30 yards apart depending upon player ages. When the Crab steals a ball, that player then becomes the Crab for the next round. As play progresses add a second Crab, third, etc.