My neighbors across the street have a rocks and boulders store. When we need rocks for our garden we hopped on the golf cart loaded them up and went back home under 10 minutes.
When my parents put a big rock in the guys they bought it from came with a skid loader. They asked about ten times "Now where exactly do you want it". Dropped it off the skid loader and it has not budged since.
The first time I saw the daycare scene, I thought the bonnets were horrible lower jaws full of teeth, and I had no idea why the rocks had them but I just moved on.