The purpose of this project was to build a box where we could drop garbage bags when our primary garbage bin is simply not enough. We have a family of 8 in total, and this obviously creates a significant amount of trash. Combined with a garbage truck that only comes around every two weeks during the winter period and add hungry animals to the mix and you can easily see how this becomes a necessity.
This was a wife sponsored project, those are the ones I love as she will not only provide feedback but also usually help with the physical build itself.
The box is assembled with a few 2x4 as the skeleton structure, there is no bottom (we wanted any fluids from the bags or snow/ice to be able to go straight into the ground), and the top is a simple 1/4 inch plywood plank that was left over from a previous project. There are probably between 5-8 pallets into this project simply because of all the planks for the sides. I already owned the 2x4, but there are I think 4 in this project. The kids could climb on the box (even if they are told not to) so we wanted it to be sturdy and not collapse.