They never let me anywhere near the studios but I'm sure I'd have the best "one hour - all request hour" if they did!
What's the coolest thing you're dad ever made for you? A tree house when you were a kid? Your bike? Did he help you build a car? Check out this "Do It Yourself Day" who built a Space Center for his fiver-year-old son, using electrical parts that he salvaged or found lying around.
Click here to see the step by step photos.