This is a good move to start with if you're a beginner.
1) Sit on the floor with your left leg bent and your right leg back in a 90 degree angle, support your body with your left hand.
2) Bring your right leg around in a wide circular motion. At the same time move from a sitting position and roll in to a ball with your balance on the top of your back.
3) Pull your legs in fast and keep your body in a tight ball. The less of your back touching the floor, the longer you'll spin.
4) End with a Pop Out by moving to your feet without using your hands.