Kerbal Space Program, for those that haven't heard of it is a neat sandbox vehicle construction simulation centered around these Kerbals and there space exploration dreams.
As of today, it's on Steam (Steam Greenlight?), as a "Early Access" game. However, the current version as of writing is 0.25, the official beta and it's brought a lot of changes and a playable career mode.
Unpaid shilling aside, let's see what you've made. I've fired up KSP on my work computer but don't have any good craft. I'll have to check back later.
Pro-tip: Press F2 to disable the GUI before taking a screenshot (F12 for Steam, F1 for game).
Please submit images and descriptions of craft with Stage/dV info in descriptions fitting of a Kerbal Engineer.