This is a fantastic exercise for your stomach muscles.
Start this exercise lying on your back with your knees bent and your feet flat on the floor, your arms are down by your side and your hands are facing downwards. Your pelvis should be in neutral.
Bring your chin to your chest and lift your head, neck and shoulders off the mat so that you can see your knees. Lift your arms and keeping your body steady, start to beat your arms in small movements. Try to beat five times for each in breath and five times for each out breath.
If you are ready to move on to the next stage, try this exercise with your feet off the mat and your knees bent. When you have mastered that, try moving on to level three and straighten out your legs as in this photo.