Ducks are unreliable.
At the RepRap forum on Saturday, I met a guy called Andy Kirby who had a really interesting problem… that he solved (or, is currently solving) using Arduino boards, an old servo from an RC car, and some Aluminium sheet.
Andy keeps Ducks, and as loveable as they are they’re impressively thick. So thick in fact, that they’re pretty bad at incubating the eggs that they lay. Andy wanted to breed some Ducks, and so he built a contraption to heat, and move the eggs in a way that a mother Duck should.

I was struck by Andy’s solution- it’s really simple, while being really useful. Plus, I love that it fills in the gaps that a stupid/unreliable Duck leaves in rearing it’s own ducklings…
Incidentally, this might be right up Rob Phillip’s alley…