You wrote: "That sparked an interest in Astronomy with my son; which was about the same age as when I got into it. I remember my dad buying me a telescope for Christmas, which is what I’ve done for him this year, although he obviously doesn’t know it yet. He’s had to put up with a weak pair of binoculars in the mean time which is okay for watching the moon, but nothing else."
Great gift, wabbit, even as humans are erasing the skies with night lighting and smog. I still have fond memories of sitting in a newly constructed snow fort late on a freezing night waaaay back in 1960(?) sketching a winter lunar eclipse with my then new telescope. Hope your kid gets a chance to see Comet Holmes before it fades. It was amazing even with binocs back in October.
http://www.skyandtelescope.com/observing/home/10775326.html
FWIW - IMHO, the best free skywatcher appl is Stellarium - http://www.stellarium.org/
Another really good planetarium appl is Asynx' Planetarium, though it lacked for user-friendly intuitiveness. I believe they've tried to rectify that somewhat in the latest version, but I've not yet downloaded it. http://www.asynx-planetarium.com/index.php