Get him a low-end Leatherman tool (maybe a LM Kick). Once he's done playing with all it's neat features causually mention that they make much more interesting ones with much more stuff. He'll demand one of the better ones. Buy it. Now you have two quality multitools.
Repeat as necessary.

-Blast
You are a sneeky SO..........! I like that in you.
_________________________
Our most important survival tool is our brain, and for many, that tool is way underused! SBRaider
Head Cat Herder