Strong tummy muscles

So Mylo does this deal where he sits up straight..then lifts his legs straight off the ground and wiggles his feet. And he does it for a long time without stopping!

Now that is some strong tummy muscles!

I tried to capture it here


Then he puts his feet down and looks at us like, what, it's no big deal



It doesn't sound hard, but sit down on the ground with your back straight and your legs straight out in front of you. Now lift your feet off the ground, hold them there, then start to turn then around in circles and wiggle them, then keep holding them up for a while..then tell me how your stomach muscles fell..yowzer!