I'm only 12, I've been playing for a year and 2 months, I don't have parental supervision, I trade all the time. My suggestions is teach them the basics, and stuff that will keep them safe. Pretty much teach them it's ok to use ignore, report, change instances, turning off trades, and so on. It took me about 3-4 months to learn about how not to get scammed, to stay safe and such, but if you let them get on dis that would probably help. I personally feel a lot safer here on dis, since everyone has advice, and it's easy to get to someone who can help, unlike in vmk when you have to go through a lot of annoying steps to contact a staff. You don't have to take my suggestions if you don't feel safe with them, but just throwing some stuff out there and ideas I have come up with.
Lion