The TAPI by Dreamfarm turns any faucet into drinking fountain! Just attach the rubber nipple to any faucet, squeeze and voila! You have a very colorful inexpensive water fountain. Would be good for kids bathroom.
Abandoned pens and other such stationery stand a chance at purposeful usage, thanks to the Pen Printer. The device uses the ink from discarded pens to print on paper. The current tech may not support such an ambitious idea, but it’s worth the exploration,