The link for downloading sketches, as provided on page 15, 404s:
http://hobbycomponents.com/starterkit
The sketches provided in the project book are also fairly sporadic - some projects have them, some don't. Nothing's available on the HC GitHub account either. I haven't even looked into libs yet...
I can ultimately work around all this. The 7 year old nephew I was hoping to give this to for Christmas, probably not so much.

is the content that was available at the above link available anywhere else?