You will need a dash of red pepper, a cauldron, a egg, some salt, a wand, bats wings and water.
First you will need to mix a dash of red pepper in a cauldron.
Then a egg then some salt then a frog then a bats wings then water and a wand.
Then put it in the fire for a hour and a half.
Then take it out of the fire and take it to school and poison the children.
They will be ill the next day.
The cat will be ill as well.
I hope she's joking!