Great advice. I also wrote an article about training a puppy with a toybox. Here is a link:

http://giftofgracekennels.com/id54.html

It's called Whos Toy is That? ©

For me it is all about using scents to teach them which toys are theirs and also a box for toys that are just theirs.

Great post. Always good to see how others train for this.
Nicole & Sheena & Puppies