2 Liter Bottles of Light provide as much light as a 50 watt light globe. The slums of the Philippines are getting an extreme home makeover in the form of two liter bottles in their ceilings. The bott (Bottle Lights Ceiling)
The Welly Boot Box - ingenious combination boot jack & door-side storage for two pairs of garden Wellys (Wellingtons) - or any other boots, I should think. I could see doubling the length to accommodate a family - Also serves as a convenient seating bench
As I grew, I would put plans that I felt safe and secure in changing to my taste, simply a bit, here and there. So why simply limitation yourself to developing furniture? Chairs are typically neglected woodworking tasks.