For a completely different approach to easy 3D modeling, CB Model Pro is worth checking out.
http://www.cbmodelpro.com It's free while the product is in beta which I would expect would be for some time to come.
While it's not a mature 3D product, since it's still in beta, it already shows signs of providing an interface that will appeal to a much broader audience than the more mechanical approaches of previous 3D modeling applications.
CB Model Pro is the big sibling of a wonderful 3D Modeling package for children. While it's aimed at children between 7 and 14,
Cosmic Blobs is my 5 year old granddaughter's favorite computer activity. She needs a little help from time to time; but, she can do most of it by herself. So, that should tell you something about the CB Model Pro interface... which is very similar.
The operative words to describe these products are EASY and FUN. You can find tutorials in my blogs.
Blobfans (CosmicBlobs) and
CBModelProFans.