Here's how we did it. It was surprisingly easy!
3/4 in. Irrigation tubing (100 psi for kids, 160 psi for adults)
textured tape (gaff, hockey, or medical tape...any cloth tape)
tubing cutter (not necessary, but helpful)
Here's the label from the tubing...
Here's a close-up of a connector:
These are my PVC cutters. I got the cheapest kind, and they were $12. They went through the tubing like butter! You could also use a small saw to cut the tubing.
Dip one end of the tubing in hot water for 5-10 seconds.
Slip the connector in.
At the party, I provided a massive amount of electrical tape in all colors. You can get it at your local hardware store, or buy online. Online was a lot cheaper, but I had to pay shipping too.
The kids taped the hoops as best they could. Just use the electrical tape and work in a spiral all the way around. Some of the little kiddos had the tape overlapping and thick, which was fine. The bigger kids were perfectionists though.
I made this gal's "Top Gun" dress :-)
Even the moms played! We found wrapping the tape to be very relaxing, and when we finished one hoop, we felt like our hands wanted to keep wrapping.
A tiny hooper.
A bigger one. (I made her skirt too!)
After the kids wound the electrical tape, the moms helped wind the textured tape (I used gaff tape) over it in a very wide spiral. The textured tape makes the hoop grip your body a little, making the hoop easier to keep up.
P.S. This is my favorite picture of Sprite's party. My smart child is flinching when Mr. Apple brings out the lighter :-)