Wunderland has added an airport this year complete with different airlines landing and taking off. Planes going to their gates and planes leaving their gates to taxi. It's just marvelous.
Got a link today from my Aussie friend that shows what is called the smallest working V12 engine. It shows the machining of many parts, including the crank shaft. Just figuring out where and when to make those cuts looks to be extremely hard. Watch him as he mills that crankshaft and then begins to put the engine together.