brackets that hold the ruler to the wall. Print this twice, then drill holes in the ruler and mount the ruler to the brackets, and then the brackets to the wall. The big pieces go on the ends of the ruler, the thinner ones 2' from the ends. Parts that are still being designed include the slider and the bar that sits on top of the kids' head. I'm in a rush tonight, but more info (and metric conversions) will be added, as well as the other parts to print.