Hollow Push-Up Beam Crawls while Piggybacking Foam Block

Since we did not have all the beams, I thought I'd kill some time on the two high beams we did have with a little conditioning and concentration game. The Hot Shots loved it so much, we spent 2/3rds of our beam time on it. I figured they were getting stronger working their core and support strength. Since they were enthused about it, why not?

At first, they had trouble; then they started figuring out a certain "cheat"- foam block on the upperback and behind the head. I might have to create a rule on no resting the foam behind the neck; but if it helped them keep their round turtle back, I couldn't really complain.