The AquaGlow Rainbow Fountain ($50) will add a colorful water light show for your pool or pond. The product runs off water pressure – a garden hose or the pool return line provides all necessary power.

No batteries or electrical power required, simply turn on the water and watch enjoy the show as AquaGlow shoots continually changing color-lit water up into the air.

(Via GadgetGrid)

This Korean made clam-shaped Rainbow Stone ($38) uses a mirror and LEDs in various colors to project a colorful rainbow onto your wall.

Also make sure to check out the Rainbow LED Home Projector.

(Via technabob)

Rainbow In My Room ($38) is a projector that lets you create an arced rainbow across a darkened room using multi-colored LED lights.

To turn it on, just wave with your hand. A timer will turn it off. The projector can run on 3 AA batteries or an AC adapter. Treasure at the end of the rainbow is not included in the price.