and then you can hook the other side to your clothes, etc, so you can wear it?
Flanges are flat plates attached to the ends of pipes and associated fittings such as valves, auto mufflers, etc. Their purpose is to provide an attachment surface for bolting two such fittings together. An ordinary flange has a hole to accommodate flow through the fitting; a blind flange has no hole and is used to close off a fitting with a mating flange. See the ref.
A Kong toy. They come in large sizes. The black Kong is reportedly indestructible. You stuff Kongs with goodies or food and your dog spends a lot of time trying to remove the contents. You could use the Kong as a ball. The Kong is an abnormal shape, so beware, it bounces crazily. It's great jaw stimulation, and terrific mental stimulation too.
