I don't think overwhelming somebody new to guns with the manual and a tool-kit is the best way to educate. Talking them through the safety mechanisms and the basic function of the specific firearm you're introducing is probably better. The courses you take in Canada to get authorization to purchase the firearms goes through the basics of safety and you're better off just introducing them to those because most firearms are very different when it comes to disassembly. You want springs flying off into the distance, never to be found again and your firearm to be rendered useless, then go ahead. I agree that you should have a complete understanding of your firearm for it to be the 'safest', I'd also say that having a novice who hasn't shot a gun before literally disassemble and reassemble your firearm in front of you at the range is not a good experience for either party involved.