A great kit there.
Has DS practiced with the paper matches, they can be a bit tricky ?
I gave my kids a packet each and asked them to light all the matches - as a practice.
Ditto the strike anywheres (and regular matches too). They do lose patience, but I tried to keep then going for as long as it was "fun".
I've had a few years to practice all sort of matches, but the kids actually don't get much of a chance. Having a whole box (or more if they like), gives lots of practice at different holds and techniques.
Remember that its not "good enough" to strike the match, encourage him to hold it for at least a few seconds. I've seen kids strike a match, then throw it or drop it. Obviously, you need to hold a match long enough to light the tinder.