Photo source: http://www.instructables.com/member/M.C.+Langer/
"Wow - that must have been fun."
Anyway, insights from looking at the photos:
Products that count by day or set time and turn on an LED switch - like flowerpots, alarms, phones (LED phone straps when calls get too long, home phones), showerheads (in kitchens, public facilities, etc.) that display indicators when a certain amount of water or electricity is used.
Or products where if you use TV or games for a certain duration, LEDs or moving robots or dolls activate to draw attention to your surroundings.
It would be great to make products with functions like these.
