Our pet birds kept trying to get under the water at the sink so I decided to make a fountain for them. It's a bit splashy so you'll want to place it on a towel or in a larger tray / basin. We only run this for an hour or so when the birds are out and they have been enjoying it greatly!
It runs off this cheap little pump.
The “base” is 200mm in diameter. The pump press-fits into the “floor” which then screws into the “base”, with a notch to run the cable through. From there simply screw on the “tube” and the “top” and you're in business.
The author marked this model as their own original creation.