First, thanks for the giveaway. I found out about it on G+ and it's downright redonculous.

1. The most interesting thing I've seen done with a 3D printer is when Elon Musk showed off his titanium printer printing jet engine parts. That right there is definitely the coolest thing I've seen done.

2. What would be the endgame for me is to 3D print body parts. Mainly for those with injuries such as vets, or those born with genetic defects or simply just things that need replaced. That would be the ultimate gift to world using 3d printing in my opinion. Hats off to those printing prosthetic parts now for those that need them.