Related Clues:

• Comment from Jerry Mathers
• Cousin of ''hmmm!''
• ''Golly!''
• Beaver utterance
• ''Is that so!''
• 'I never would've thought of that!'
• Dobbin's 'right'
• "No kidding?"
• "That's a surprise!"
• 'How about that?!'
• 'Is that a fact?!'
• "Really?"
• 'Who'da thunk it?!'
• "___, ya think?"
• "__ whiz!"