One single twisted cypress knee, with a hole drilled right up the center. Cut out a slot for a mini-pump at the bottom, turn the setting on low for water flow. Set a thin layer of natural small dark stone around the knee, and decorate it by drilling holes for an ivy. When the ivy starts to grow good, pull the runners onto the land, out of the water. Keep that whole thing to one side, use a slate stone separator to hold back the medium stone and peat/sphagnum mix soil. Plant stunted ferns and mosses on the other side. Then just add two ground dwelling frogs.
(You may have to dig around for some stunted ferns, I had to look for weeks before I found mine... Most ferns around here are over two feet tall, my stunted ferns are only 6inches tall, full grown.)