Sophia was busy in the corner setting up the refreshment area when the students started walking in. The refreshment was made specially by her personal elf with ingredients she had bought so of course they had to pay for what they wanted. The good news was everything on sale was 8 sickles flat. They could all afford that couldn't they?
When people started arriving Sophia moved to the head of the class to address her students and the audience.
"Welcome to our transfiguration class circus!." She paused for applause, because people should be polite and clap for her students.
"My students have been working very hard leaning new spells and dedicating a lot of time into making this day an enjoyable one for you." Well she hoped they had been working hard.
"First an foremost this is a lesson of sorts. Most of the spells that the students will be using were taught this term. Secondly this is a charity event so all proceeds will go directly to Hogwarts so don't be shy about spending." They could clap at that too if they wanted.
"Do relax and enjoy the rest of the show. Student one you're up!"