I've done a lot, probably more than you have. With six kids (yes 6) between the ages of 26 and 7, every single one of them have been exposed to modeling and have built kits with me and alone (except for the 7 yr old, he's not up to glue just yet).
Additionally, a couple of my nephews have built kits with me (just the one who lives near by and the one who stayed with us for a summer). I've also handed out more Italeri HMMWVs to neighborhood kids with those cheap tubes of Testors glue. Since I've spent the vast majority of the last quarter century living on military bases, HMMWVs are universally recognized by my kids' friends and I know their dads will be more than willing to help out since I work with many of them (the dads).
When I used to help out with local shows, I often helped with the make & takes if they were offered. Several of my kids have attended shows with me. Only my 18 yr old daughter (when she was younger) entered the local contest. She won four trophies, even though one was for 3rd of 3, she still gave it her best. She should have won a 5th; the contest organizers told me they found out a dad had built a kit for his son and it was entered it as his son's work by mistake. I told them that she was fine with the 4 and to let the boy take that one home. It didn't seem right to take back a trophy from a kid to give to a girl with four wins already.
The 7 yr old has assisted with just about every Revell Star Wars kit. I gave him the old AMT droid fighter kit to build (a 3-pack), but he broke one of them and I told him we should set it aside to build the other two when his fine motor skills were better. I bought him the Revell Slave 1 Boba Fett ship for Christmas. We'll build it together in the next few days.
Strangely, my only kids to build well and stick with it for any length of time were my two daughters. Although both have long since left modeling, the 23 yr old was adept at building cars and these little Pokemon models when she was younger. The 18 yr old prefered the older Tamiya armor kits like the Panzer II F/G, M151A2 Jeep and she loved the old Tamiya Pink Panther.