Step 6: Bubble Wrap Wires
After all the lines are attached together. You want to bubble wrap between the batteries. To make the hoop quieter. And protect the led's.
Remember you want the batteries to be able to slide through the pipe. So only bubble wrap the led's and wires. leave that batteries exposed. Start at the end that will enter the hoop last. So the overlapping doesnt bind in the hoop when pulled through.
If you want to add some weight for a fitness hoop, just add some fishing lead weights in this step. Or make your hoop last longer using another 4 batteries in series. Double the Capacity.. but that would be a little more planning and different wiring.