I built this interactive water fountain using a water pump, washer machine hose, Arduino, servos, string leds and a Leap Motion infrared camera system. Leap Motion connected through Unity to read the rotations and positions of the user’s hands. The angle of the right hand controlled which direction the nozzle would spray, while the height of the left hand changed the colors of the leds.
The electronics are very waterproof. It was able to spray tons of water on the control box. I housed everything inside a Pelican case. All the hardware packs neatly inside of the bin to easy transport.