ArtSkool debuts with a workshop that highlights one of the first art mediums: Mud!
1. Existing at or from the beginning of time, primeval -- the primordial oceans
2. (esp. of a state or quality) Basic and fundamental -- the primordial needs of the masses
While it's unlikely that the first sea creature to give land a try looked back at its tracks and noted the artistic pattern they made in the mud -- clay was and remains one of our primordial materials for making art.