Frankenstein

In The Sims: Livin' Large, your Sim can become a monster by drinking a purple potion from the Concoctinator Chemistry Set. "Frankenstein" will be uncontrollable, and will walk around using items randomly, which will always break them. However, if you have any art easels, he will paint a child-like painting on them. You can contain him this way by surrounding him with art easels, which he will always use. Once he turns back, repair what he has broken and sell his paintings (which sell for a lot).