*Scribbling down what the professor has said about Swtiching Spells, Jen takes a deep breath and pictures the frog she wanted the goblet to become. She swishes her wand and says the incantation: *

"Transmogrify!"

*Nothing happened. Sighing, she practices the wand flick for a while then tried again*

"Transmogrify!"

*A big, purple croaking taod appears and she has no idea how that happened*