Finneas could ... not recall what they were meant to be learning today in Muggle Studies, which was a huge problem because he was, you know, THE PROFESSOR!?! Fortunately, he had a back up plan and it came to him when he opened the back closet and a giant inflatable pool fell out from it. How convenient! Of course this meant he spent ALL day using the power of his weak LUNGS to inflate this giant, inflatable pool, but fortunately it was all blown up and ready to go for when you entered in the classroom.

That's right. An inflatable pool.

Finneas had managed to push all of the usual class furniture (desks & chairs) into his office so that when you walk into the classroom, you're met by the sight of a giant, inflatable pool that is almost the width of the entire room! How EXCITING? The pool only has enough water to go up to your ankles because no one would be drowning today, thank you! Your professor stands (barefoot) just inside of the door way, trying not to look like he spent the last 5 hours blowing air into a giant, inflatable pool and asking that you take off your shoes and socks and leave them lined up against the walls! Once you've done that, he invites you to step inside of the pool where you will wait for class to begin.