Now I don’t know what is more trippy making it seem like you have a floating rainbow in your hand or the person that came up with the idea for a flip book the creates the illusion that there is a floating rainbow in your hand. Well either way I haven’t quite figured that part out yet all I do know is that this little book is pretty good at creating this illusion, but my question is since the pages are black do I need to where a black shirt every time I demonstrate this? Hey if this isn’t to your liking there is always a 48 Inch Arc Folding Rainbow Umbrella.