What you need to do is just show him your collection.
Make a note of what knives he looks at with
that look.
Get him something with the features of that knife, unless it was your ultra-tactical-slasher-black-coated knife
I was planning on getting both of my brothers knives, and I already have an extra Sharpmaker that's going to them. My 10 year old brother is in Scouts, my 18 year old brother is now an instructor for a military-esque training organization for teenagers. Needless to say, I'm going to get them different knives
The younger one seemed quite interested in locking mechanisms of my various knives. You don't know how happy I was to see that

Both of my brothers were interested, actually, but upon hearing the prices of some of the knives...
I'll probably get a strong lockback to go to the younger brother, like a Delica. For the 18 year old, I might get a utility fixed blade like the Becker BK/7.
****edited to add:
Hmm, with all the problems that I've heard about frame-lock KISS-style knives, I really wouldn't get that Schrade knife. To me, when buying a knife as a gift to my brothers, I would want them to have the best, simply because I would hate to see them cut themselves badly due to an unproven knife. Especially an 8 year old!
I think you should stick with proven quality stuff, CRKT has some nice knives that go for under $30 on ebay. Maybe an M16Z? I've got one, and the thin handle might be just the thing for a smaller hand. I actually have an aluminum handled one incoming, and bids on other M16's too. I just like the design too much!