[s12e17] The Conference Valuation Now

Sheldon and Amy use the children to test cognitive and motor skills, much to Howard's amusement and Leonard's distress.

Bernadette eventually fights to keep her, and Penny declines the rival offer, though Bernadette secretly keeps a napkin with Danny's high-salary offer hidden from Penny. The "Guinea Pig" Day [S12E17] The Conference Valuation

Danny offers Penny a job, leading her to realize she doesn't always feel appreciated by Bernadette. Sheldon and Amy use the children to test