What do they like? Planes, cars, tanks or ships or even Gundam/ SciFi. YOU have to know that first, then you can find a model. Snap tite cars I don't know much about But Airplanes, The old Monogram F-4 and F-14 Where pretty good. My youngest built the F-4, though I did help, when he was about 7, and I helped with the paint. He then went to Gundam Models. My oldest Skipped Snaptight went straight to "Regular" models and Gundam. These are some of MY recomentations:
A/C Monogram F-4 OR F-14 There was also an OH-58/jet ranger Helio
Armor All I can remember was a monogram Tiger and Think there was a Sherman. If they like tanks it is a tank and comes looking like a tank!!!!!
Autos Monogaram did a CJ-7 Jeep that was good and I know there are a lot of car snap tites that are pretty good.
Ships I dodn't remember But there are some fairly easy ship/boat models that you won't be out a lot of cash, some Lindberg rereleases and such.
Hope this Helps, Good Hunting, G.W.