Grumbling under his breath about wandmakers and unreliable suppliers as he walked along the corridor, levitating a large box in front of him. Oliver nudged the door open wider with his foot and entered the classroom. He was pleased to note that the students were all sitting quietly and the room seemed to be in tact.

Thumping the box down onto the floor, Oliver looked over at the students. "Sorry I'm late. My original plans for this class have gone sliiiiightly awry." He was very much tempted to swear again about his suppliers but he remembered where he was.

"Now before I tell you what we're going to do today, I mentioned last lesson what Rune tablets/sets can be made out of. Can anyone remember what they are?"