Mary Simpson was almost crazy with her three kids.
She complained to her best friend, "They're driving me nuts. Such pests, they give me no rest and I'm half-way to the nut hatch."
"What you need is a playpen to separate the kids from yourself," her friend said.
So Mary bought a playpen.
A few days later, her friend called to ask how things were going.
"Superb! I can't believe it," Mary said. "I get in that playpen with a good book and the kids don't bother me one bit!"