I spotted that the Hero Kids Complete Fantasy Bundle was on sale for an absolutely massive reduction - $19.95 down from $63.83 - and so decided to pick the thing up. I'd played a few simple homebrew scenarios with my 5-year-old son, and had heard some neat things about this game.
I'm delighted with the results. A simple ruleset for my son, a clear guide for his first-time-GM Dad, and a rich collection of printables, inventory items and character sheets to really add to the experience. My son and I have both been having a great time with this - well worth the price.
[5 of 5 Stars!]