Who said "Children should be seen and not heard."?

This quote is attributed to Grandpa Joe.

Children should be seen and not heard. - Grandpa Joe

"Children should be seen and not heard."

Grandpa Joe Humor

Character in Charlie and the Chocolate Factory

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"Time is the greatest gift of all."

"The greatest magic is believing in yourself."

"Candy is dandy, but liquor is quicker."

"Never talk back to your elders."

"Never underestimate the power of a good laugh."

"Laughter is the best medicine."

"A good laugh is the best medicine."

"Laughter is contagious and wonderful."