Stand upright with your legs together, arms at your sides. Bend your knees slightly, and jump into the air. As you jump, spread your legs to be about shoulder-width apart. Stretch your arms out and over your head. Jump back to starting position.
Your jumps should be roughly 1-2 inches off the ground. Keep your toes pointed down slightly on every jump and make sure there is always a slight bend in your knees and that you are landing softly on the balls of your feet every jump.