Check it out, a Super Mario Bros. Aquarium.
It’s a scene from the Super Mario Bros. video game, complete with “the clouds, grass, mushrooms, ducks, pipes, level completion flag pole, resting castle and the stage indicators.”
The castle is made with Lego bricks that have been painted and covered with clear enamel. The pipes are made of PVC piping.
Here’s a video that lets you see the aquarium in action: