Buckets sit on an unsupported table hanging in mid air, holding it up. Or down. Or both.

I saw a picture of this IRL, and wanted to recreate it. This one, at 100%, is about 8" total height assembled.
I put sand in the buckets. I also used one string for each side's buckets, rather than try to make all 4 separate. That way only two equal strings are required, and are fed through from one end to the other.
I created the table in two pieces so if you print on glass, you can get a nice smooth finish on the table top.
The two pieces for the frame and the two pieces for the table are friction fit, and shouldn't require any glue

Creality

Ender 3 Pro

No

No