Trampoline and water balloons

It's a beautiful thing.

Know what? Barry and I and James, these kids' father, could do back flips, and dare-devil forward flips. That's where you bend your neck backward instead of tucking in so that you'll break your neck if you landed before you can tuck and land on your shoulders. 

We taught ourselves, taught the whole neighborhood actually, by stretching a gardenhose across the top to use as a guide to flip around. Like a soft pole.

And we could send each other higher than we could go by ourselves by synchronizing and bouncing hard just before the sendee bounces, jabbing the top just inches from the spot the sendee will bounce, to lower the top a few inches just before it snaps back. It  helps the other guy get a deeper bounce and, ping, there you go a lot higher than you can by your own weight. 

We bounced so much and so hard we all ended up with backaches. Bad ones. There are only so many hours you can do this day after day, week after week, until your body breaks down from increased gravitational force. And that's what happened to all of us. 

I don't know about them, but I haven't had a backache since.