The simplest toy, one which ...

The simplest toy, one which even the youngest child can operate, is called a grandparent.
 Sam Levenson

Quotes from the same author

Don't watch the clock; do what it does. Keep going.
 Sam Levenson
It's so simple to be wise. Just think of something stupid to say and then don't say it.
 Sam Levenson
Insanity is hereditary; you get it from your children.
 Sam Levenson
When I came home and showed my mother my report card with a mark of 98 in arithmetic, she wanted to know who had gotten the other two points.
 Sam Levenson
The reason grandparents and grandchildren get along so well is that they have a common enemy.
 Sam Levenson