I got a 3d printer for some hackaday stuff that is on the horizon. I had this idea for a modular vw bus toy for quite some time. The body stays the same, but you just swap out whichever roof or suspension you want. Here you can see the stock suspension with the loaded roof. If you lift up the body, you have a nice little storage box inside. It was pretty fun being able to literally design something on my computer, hit print, and have a toy.
If you know someone with a 3d printer, you can download the files here, and print it yourself!