Here's one of them. DH put it together after seeing one a few years ago when I was co-chairing the first Master Gardener home garden tour (2005). We were wondering how the owner was able to keep everything watered without a sprinkler system. This was his "invention" for a moveable sprinkler.
I can post better close-ups if you're interested, but it's just a tin can filled with concrete, that has a piece of PVC pipe stuck in it, with a connector at the bottom side where the hose connects. We have all kinds of sprayers that easily connect at the top of the pipe for different areas. You can add different height pipes by just screwing them into above the hose connector. This one is nearly 12 years old and the tin can has yet to rot off the concrete base. It honestly kept the spider mites at bay this past summer. I place it under the tallest brug and let it shower the shorther ones. Doesn't take long to make the mites move on.
I'll have to find the other one that was a Rainbird sprinkler in another life. It has an adjustable pipe that gets under the leaves of even my tallest brugs. It has a few different sprinkler heads.
This is a close up of the connection:
