Don't you love it when that happens? $;-)
I also saw your thread on the Boy Scout adventure you and your son were recently on. Looks like a great time was had by all. My boy will be old enough to start scouting in another couple of years.
Those pictures of Idaho were truly awesome. I have to get myself and my family back out there, sooner than later.
You have much to look forward to. Get the scout books now and start mapping out his path ... is he into Cub Scouts in a couple of years? If so, then work with him through that ... it is an excellent pre-cursor.
If he will be into Boy Scouts in two years, you may consider getting him into Cubs now.
Regards.