Indoor fairy garden
I built my wife an indoor fairy garden with a stream. The box is red cedar with a pond liner. A couple inches of 30ppi filter foam as the drainage layer. There is a pump hidden underneath the hobbit house and an ultrasonic fogger under the moss lid in the back. All of the non natural things were 3d printed.
I had a hell of a time trying to find information when building it. Please ask any questions if you are working on something similar.