Concepts to sell: Rainbow kleenex (the kids'll love it). Picture frames that allow you to insert a page of text or whatever in the background. Waterproof paper holders for showers, so you can wash and read at the same time (great for last minute studying). I have a wind-up mouse. I want a wind-up squirrel that twitches its tail. How about fan blade art? Looks good just sitting there, and can also be fun to watch when it is spinning. College texts (novels, for instance) with more extra space in the margins for taking notes.