Find a cozy spot to lie down with a buddy—a stuffed animal, your special blanket, or a beanbag—on your belly. 
Take a long, slow breath in through your nose. You might see your buddy rise as your belly fills with air. 

Let the air all the way out. Your buddy will float back down. 

Try it again. Take a long, slow breath in through your nose, and let the air all the way out. Watch your buddy rise and fall. 

Keep going, and stay here as long as you like.