The Invention Studio prototyping instructors had a Secret Santa gift exchange, and we had to make something based on our person's interests. Because my recipient loved space, I made him an adorable wooden rocket desk toy. I wanted to give it a "realistic" see-through acrylic window, using an acrylic rod inlay in the blank. If you finish the rocket well enough, people will think that there's just a hole in it... that is, until they go to pick it up!
assorted scrap wood with a 2x2" cross section
wood lathe & lathe tools
I drew a LOT of different shapes of rockets. While this isn't necessarily a key part of building the project, doing a bunch of quick sketches can help you collect your thoughts. It also gives people a chance to give you feedback before you spend a lot of time making a thing.
After I made some quick thumbnail sketches, I had my friends pick which one they thought was the cutest. I scaled up the drawing of their favorite.