We don't ever have those cute little cardboard milk cartons that Origami Mommy uses in her tutorial because my kids chug milk by the gallon, and all the plastic bottles have been comandeered for another craft project, so I used any and all smallish boxes that I could find. There were butter packets, crayon packets, shoe boxes, candy boxes from last halloween, even some random boxes that I'd asked the lady stocking the shelves at Michaels if I could take home.
Lots of random bottle lids that we've collected too.
The bigger trucks worked nicely using a couple of Epson ink cartridge boxes as the front section.
For a couple of the cars I cut out triangles from the top corners of rectangular boxes and then folded down the sides and glued them to make a more carlike shape from the one box.
I had six kids over and it worked out that we had enough for them to make two vehicles each. They got decorating with sharpies and stickers and paint...
Gradually as the kids finished their cars and trucks I sorted out the wheels for them using a hot glue gun. You should go check out Origami Mommy's tutorial to see how the working wheels fit together. We used beads to make sure the bottle tops didn't come off. Here are a couple of underneath pics (please excuse the tea stained grout! I clearly have a drinking problem)
Some of the 12 finished vehicles. I love that they all wanted to make the trucks have faces like Mac from the movie Cars. As you can tell from the last two, I was running out of things to use for wheels!
Then they took them outside to draw chalk roads and race them.So, thank you Origami Mommy, for sharing a top craft all the way from Japan, that rocked my kid's afternoon!
Next thing I want to do, probably when I have fewer kids over, is to help them to make some vehicles like these that have rubber band mechanisms to power them. My two are into the whole rubber band propulsion idea, after we made the wooden "power boats" at Lowes.