hey robby,
first off: to your son, you will always be the best and coolest dad for ever more! I still am (somewhat) that little boy I was in 5th grade, and if my father would have re-created my favorite song back then in his studio (I believe back then it was Sailor with "Girls Girls Girls") I would think that he is a god or even something bigger, like all gods unite or whatever, in any way the coolest thing any boy can think of!

wow! and the biggest respect to you for being a cool dad, listening to your boy and making dreams true.
and regarding the 5th grade music taste: how cool is that? I really like "Radioactive", and if this is the favorite song of a 5th grade, then America's future is bright!
last, but not least: good work from both of you. I don't know if you needed a lot of polish and /or pitch correction, but the outcome is pretty good. Father and son together singing the same song, this is how good as it gets! One little, tiny point of critizism: with a cover version, I prefer an "own" version over a complete copy. But this is just my sick opion, nevermind!