And pretty much as soon as I'd built that one, my eldest son moved into a room of his own... and wanted a loft bed, too. His incorporates a second bookshelf, a desk, and a secret compartment, and is designed for someone with longer legs, more books, and who isn't fussed about sleeping on a cloud...
Step 1: Design: loft bed #1
The side of one of the beds is a stylized cloud. It's pretty cute for an eight-year old, but I have no illusions that a teenager will necessarily think it's just as cool, so I anticipate removing it and replacing it at some stage with some other design. The ladder and bookcase are pretty future-proof, I hope - it's quite comfortable for an adult to climb, and we all need storage for books.
Click on the icon below to download the SketchUp 3D design file for this loft bed, and use it as a starting point to design your own.