Colorful armoire - what else is one going to do with that ugly old thing hanging around the house? Paint it fun colors. This would bring a sense of happy to any room. I want to do this in my room but to my book shelf.
Light Bike - I think this is an EXCELLENT idea for anyone who's riding a bike at night - it'll help make them more visible to cars and outlines what they are (i., you know it's a bike cause the outline is shown by the lights)