So, our backyard needs some work. There are no trees or plants (except for the lawn). We'll have to plant some. But first, the plan is to build a play set for the kids. Before we can do that though, we need to level and flatten a large section, since it's on a slope. But how? The soil is pure clay and rock. Impossible to dig.
Wait, I have an idea. Going to the store. Back soon.

Hey, look what I found. This should help.
Oh ya baby!

Nice to have some teenagers around eager to work
Ok, now level and flat, and the retaining wall is in. All that work, and haven't even begun building the play set....