We use one that was $10 from Kmart, it's black with holes so looks like stars, y can turn on just the white light, or have changing colours, or both. Spock loves her 'stars' and we put them on each night and admire them. They are actually relaxing (I think). It's taking a beating though, but still works. Been meaning to see if they are still for sale to grab another one for when this one actually dies completely