One of the nice things about using CB Model Pro is that it allows you to create multiple models ('blobs') in the design area... which is itself a 3D world. The following image demonstrates using several different blobs to create a composite 3D Model.
The tire is composed of two blobs, the tire and the rim. The character is composed of seven blobs. They are the head, upper torso, lower torso, eyes (2), shoes (2). Many 3D modeling programs limit you to one model per design screen.
This model was created in a little under two hours, most of which was pondering the next design decision.... "Should the rim have spokes or not..." etc. CB Model Pro, with its unlimited UNDO and REDO allows for a lot of experimentation in your design.