Cardboard, paper and have been my main building material ever since I was just a few years old. Scrap was always readily available and Mom bought a huge pack of construction paper back in the day that must have lasted eight years. I'd make rudimentary three-dimensional models of things like telephones or vehicles from my favorite cartoons and then try to color them with Crayola markers. Scotch tape was just about my favorite office supply and I used tons of it. Sadly, I think I have tossed most of those things before going to college. I don't seem to have taken any photos of them either, which is pretty uncharacteristic of me. I also remember, in second grade, constructing a saggy, crumbly, five-foot long model of the new 2002 Ford Thunderbird entirely out of construction paper. I reinforced the wheels with popsicle sticks like I'd seen my mom do on other crafts but that didn't help the rest of the structure much. When my parents came home that night, we didn't have anywhere to put it so I dismantled it and kept the steering wheel and column which I still have today. For the record, I was never interested in, nor have I ever been good at origami.
Slowly, the construction paper turned into cardboard and Scotch tape became duct tape or hot glue. More of my crafts started having a more functional or practical purpose. I made portfolios for artwork, boxes to carry gadgets, and gridded trays to carry Hot wheels cars. This skill with paper and cardboard comes in handy pretty often and it is nice to have in the studio classes at the architecture school.