SketchUp has a great modeling toolset. What had always been missing, though, was a toolbar with standard primitives such as a box, sphere, pyramid, etc. Of course many of those can easily be modeled and others can be found in the 3D Warehouse. However, searching around and having to learn the follow-me tool first can be quite frustrating for the absolute beginner. That’s why I thought this kind of toolbar would be a great addition.
Check out the link below and try out the extension. Hope you (and your kids) like it!