Hutson's playroom is like most kids I am sure, a disaster a majority of the time, and with cars and trucks everywhere, it is a hazard to just walk through there! I measured the width of one of his trucks and figured that a simple 1x8 would be wide enough to hold them, so wouldn't stick out too far and would not require much cutting.
I went and bought 4 1x8 in 8 foot lengths, some 1x2 firring strips and a couple of 1x4's. I used the 1x2's on the front to create the edge and the 1x4's on the side an corners. Looking back, could have just bought another 1x8 or two and used those on the ends.
Assembling was a breeze since the only pieces that got cut were the 1x4's and 1x2's. I used screws and nail gun to put it all together, filled in holes with wood putty and painted it orange. It holds his monster trucks and pretty much any other size truck, as you can see from the pictures below.