Well, when i was around 12/13, my mom bought me some really small F1 cars (5cm long!!!), just noticing that they were for assembly when it reached home....
Needless to say, the parts were "snapped" in place, so a lot of them broke, another one missing, and yet a few weeks ago my mom found out a small matches box where it was the remains... at i still managed to get one full car mounted!!!!
Of course they weren't painted, and it wasn't no decals...
After that, i've bought an AH-64A when i was around 16/17, and glued it with some contact glue, and painted with small paints (the one's to paint furniture, and small arrangements)...
Needless to say it was awfull, but at the time i think it was the best one i've ever seen!!!!
By the way, when i was much younger, about 4 to 6 years old, i really enjoy doing all the stuff with lego pieces, and i think it's where it started the "constructionmania"!!!!
By the way, i work in the construction bussiness, so....