4D Sand Printer

The 4th dimension referring to the speed and time at which this tool is moved through the various attitudes and angles to create sculptures.

It's a hand held wand shape that has a series of holes in the bottom through which wet sand is pumped to make 3D sculptures, a 3D printer. What's different is that it measures exactly its angle, where it is in 3 dimensions and how fast it's moving, exuding the sand (or other printing material) at the specific pre programmed coordinates.

So you'd plug the feed hose into a tide pool, turn it on and start waving it back and forth over the area you want your chosen sculpture to be made. So again, the reference to 4D is that it senses the speed at which you're moving the wand and adjusts the flow accordingly.

Could make a non sculpting version just out of lights, like those spinny 3D light sculpture things, only you just wave it in all directions and it illuminates whatever part of the movie or picture that's programmed.

Now another approach would just be a 4D sculpting wand that just changes shape allowing you to scrape a pile of sand, (or other material) into an intricate sculpture, again, like a magic wand. Could either bend like a snake or just have series of scraping bits like a hair comb that extend and retreat as necessary to sculpt the sand pile into beautiful sculptures like in the link.