Sarah was taking notes.. she really did not know about the iron son. She was in her sicth year and still learning things. But she did nknow the spells. She wrote down the spell's names anyways - they were good to have on her, even though she knew most of the spells.

Sarah buttoned up her coat and put the goggle on. She was ready for action. Time to get the powder in that. Wait, first the dleaning spell. "Scourigfy" she casted. All clean. Sarah took a scoop of helium and dumped it in the box. Now onto the hydrogen. She had to concentrate, or else she would lose count

1- plop 2 -plop 3-plop 4-plop Wait.. was she on four or five? It must be just her mind playing a trick on her. She added the next scoop of hyrdrogen.
Now the spell to combine it all