I have linked to a German blog www.pege.org with their permission. These are guys who use their historical engineering traditions to build some incredibly sensible products in the automotive and housing sectors. Do check their blog out. There is always something to learn over there.
My particular favorite invention is an exercise machine that drives a heat pump which you can use to make either a cup of hot coffee or to chill a tankard of beer for the effort that you put in. If you don;t feel like having a drink after exercise, of course, you can always have a protein milk shake or some other health drink, I guess.
I used to think of engineers as serious people who concentrated on technical stuff, but this site is run by someone with an amazing sense of humor. Don't give the site a miss. It is brilliant.