"Why are you struggling?" Theo pondered nodding towards her dragon statue, "isn't this alchemy?"

Her wand waved and the dragon reformed into a butterfly, "the modeling part, perhaps, not the animation bit."

"Guys, quiet!" Daphne whispered as Professor McGonagall walked up.

"The assignment is to transfigure an animated dragon." McGonagall raised a brow at the motionless butterfly. "Perhaps, less talk and more practice is in order?"

"Sorry, Professor," the trio muttered, contrite.

"...there's a difference?" Theo whispered as McGonagall walked away.

"They're physics and chemistry," she explained.

"...ri-ght. Well. You are joining us? This summer?"