With the increasing affordability of 3D printers, there are some great free online software options that offer 3D design and downloads. Tinkercad is extremely user friendly and you don’t need to know CAD – it comes with built in tutorials and shared resources.

Sketchup Make has been around in some form since 1999, having been acquired by Google for a few years and now Trimble – free downloadable software that allows you to draw a 2D model and then push and pull it into three dimensions.