3D printing event at makerspace, last Thursday was fun and inspiring. This is a weekly event, you can always join Rick Anderson at 35 Berrue Circle Piscataway Township, Thursdays 8 pm.
The size of the printer is 6 in. x 8 in. x 6 in. so largest module of your design should not exceed these dimensions. Printer uses ABS, PVA or PLA. These filaments are available in limited colors and our makerspace is not carrying them all but you can take a look to all availbel colors from makerbot store.
Basically the printer reads from a software called MakerWare allowing to read from an .stl or .obj file. You should prepare your model in of these formats. Autodesk123D and Tinkercad seem to be the most commonly used software for this purpose but as a designer I would also suggest using Rhinoceros or ZBrush. Rhinoceros has already started a RhinoFabLab.
For inspiration and watching some modalities and limits you may spend some time on THINGIVERSE.