This is where I wanted to be when it was all over. A snap tight, screw tight combo model kit with amazing customization options, available in a myriad of colors, textures, and with the advent (and affordability) of 3D printing technology - a mix of materials as well.
Part retail, part open-source, Sproo would allow the user to create new shapes and add them to an ever-expanding inventory. Of course, Sproo would work great with licensed properties, but all you really need is creative license.