I'd like to take what I've learned over the years and see if it is possible to present it in a way my 11 year old son can follow.

Where possible, I will approach topics with children in mind.  I plan on incorporating real world examples and demonstrations where possible.  Hopefully, these demonstrations will be repeatable at home and can be played with to further the learning experience.  For example, when I start discussing electronics, I will be using the water analogue; I will demonstrate a few simple "circuits" and expect the end user will be able to modify some elements of the circuit to see the outcome.