1. Artist Harvey Ball was only paid $45 for what iconic design, which sold 50 million buttons in the early 1970s?

2. The last scene of 'Ferris Bueller's Day Off' takes place aboard what kind of vehicle?

3. In Shakespeare's 'Henry V,' France mocks King Henry by sending him a cask full of what piece of sporting equipment?

4. What is by far America's biggest agricultural crop, bringing in twice the revenue of any other grain?

5. What bathtub song by Sesame Street's Ernie hit No. 16 on the pop charts in 1970?

What’s the "Kennection" between all five answers?