Learn how to spell the colors with these jazzy little jingles (from the Color Songs CD by Frog Street Press). My son's PreK teacher uses these! Kids learn how to spell their color words very easily when they learn it in a song.
They have a version of this in the x-ray lab. "Fluffy Clouds" overhead light cover Turn fluorescent lights into skylights. I've seen these in person and they really open up a room and make it feel lighter and more welcoming.