This homemade Wheatley puppet by deviantART user TRP-Chan is simply amazing!! Valve needs to hire her fast and get to mass-production, because given the popularity of Portal 2 I can guarantee the demand is there.
Here’s a video of the Wheatley puppet in action. And before you ask the question, I’ll answer it for you… yes, those audio quotes ARE coming from a speaker inside the puppet. If you want to see the steps of the construction process, you can view the post on the creator’s page here: Furin Cosplay: Wheatley