Who said "Each child will show their true nature on the tour"?

This quote is attributed to Willy Wonka.

Each child will show their true nature on the tour - Willy Wonka

"Each child will show their true nature on the tour"

Willy Wonka

Character in Charlie and the Chocolate Factory

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"A little nonsense now and then is relished by the wisest men."

"I have almost everything I ever dreamed of, but there is one thing I still want more than anything else."