Find an open space on a carpeted area or a yoga mat. Lie on your back next to your child with an arm's width between you. Bring your knees in toward your chest. Wrap your fingers around the soles of your feet with your thumbs on top. Open your legs up with your knees pressing against your armpits and the soles of your feet facing the sky. Then rock side-to-side on your back, holding your feet firmly.
Enjoy being that happy baby again!