With some misgivings, we left a young baby-sitter in charge of our three energetic youngsters.

When we returned a few hours later, she was sitting alone watching TV. I went to check on the children, and found them in our narrow hallway.  By bracing their arms and legs against the walls, two of them had climbed up to the ceiling.

"The baby-sitter taught us how," they said gleefully.

The sitter joined me, her face a deep red.  "Since they had me climbing the walls, I figured they might as well be too," she stammered.

We kept the same girl for the next two years.