Skills they learn along the way!

So at around 20-22 months of life Alexander leveled up and gained the skill "Dirt on back". It's great watching him learn stuff. He piles the dirt with a similar movement as digging but he gets it on top with quite a bit of skill! Some kinda temperature regulation and or humidity regulation I guess. I am having a good time trying to gauge different aspects of tortoises consciousness. For instance, they cannot see all the time, they seem to have to "decide to start looking'!