In Scrapheap Challenge, a competition show, two teams of three people have to assemble, from a pile of junk parts, a device for some purpose, within ten hours building time (plus a little tinkering time before testing their devices). Then the two devices are put to the test in the challenge which decides the superior device. I.E in a catapult challenge the device which propels the projectile further is superior and wins.
The show is quite entertaining and runs for a good hour on ABC 2 here, a nice extension after The Simpsons on TEN, and is quite good. The devices assembly is always interesting and there is humor as well, including an opening sketch which is usually good. The graphic demonstrations make it understandable to everyday viewers, not just trained engineers, and the challenges are simple. The devices themselves are usually the complex things, and usually obey, as do all mechanical devices, the simple laws of energy transference between components.
All in all a smashing show.