Light Show Fountain Speakers from ThinkGeek.com are a cool solution for creating light shows based on the music rhythm, right on your desk. The two desktop speakers bounce the water to the beat and are compatible with all USB-enabled devices, including the smartphone.
The speakers connect to the audio source (computer, smartphone, tablet, MP3 player, etc) using the USB cable and feature four multi-colored LED lights. The water is sealed inside the clear speakers which power via an AC adapter. Get these in black, chrome or shiny blue from ThinkGeek.com for $49.99.