I designed this toy 3d printer as a gift for my daughter last Christmas. It could be the perfect gift to encourage a young future maker. Or it might make a great desk toy for an adult who can't wait for work to end so that he or she can get home to their own printer.
It was meant to be a model of our printer which my daughter and I built from the wonderful parametric Mendel90 plans shared by Nophead.
At first I thought I would just customize the config files of the actual Mendel90 in order to generate STLs for a 1/3 scale model. Then I thought I could find stls to make models of the vitamins such as the motors. Unfortunately things kind of start to go bad when scaled that far. Thin areas of parts become too thin, screw holes overlap and screws become impractically tiny. Instead I ended up creating a whole new set of parts from scratch and with a little artistic license.
At this point my daughter has had her ToyRap for almost a year however I am not finished refining the design. I intend to come back soon and write a full set of instructions as well as add a bit more customizability. In the mean-time the file bom.html contains a bill of materials including both printed parts and vitamins. Even without a formal set of directions this and the pictures will probably be enough for someone who is determined or already has a bit of experience.
If you wish to go beyond just building the ToyRap and would like to customize it for yourself or even contribute improvements the OpenSCAD files are available over on GitHub. At the very least I would recommend builders who are familiar with OpenSCAD to grab the code for the LCD box (not yet installed when the pictures were taken) from there as the name text can be changed.