Unlike other water features these can actually be touched and by dipping your fingers in the running water you can interact with the water falls and make patterns (kids will love this). At the same time water falls can be turned off and require minimum up-keep like bubble walls. While bubble walls create a more `space age` effect however, water falls are far more natural and can make you feel as though you are sleeping in an Amazonian rain forest. Fountains: Fountains make great simple water features that come in a range of sizes and designs. This allows them to be a small addition simply placed on the side somewhere, or alternatively a large feature that demands attention depending on what you buy. Again they can be turned off, but here they can also be put away and don`t necessarily involve large installation costs (when you get smaller fountains at least). This makes them highly versatile and also means you can have several to create a room of movement, water and sound.