Sounds like a great plan and I really hope my 2 year old becomes as excited about the hobby as your son is. Im a complete newbie also and bought the Hobbico Superstar 40 ARF with very high hopes that my boy will grow up loving this addiction as much as I already do, and I haven't even flown yet.

Anyways, after reading so much praise for the Avistar I wish I'd gone that route, sounds like a slightly more capable plane than the Superstar.

Hope you guys get into it and have a blast doing it together. I already daydream about me and my boy in a garage full of airplane parts and balsa dust, up to our elbows on some giant scale plane.