A funny thing happened at the museum

I took the kids to my local history museum yesterday. It was hectic and fun. I'm going to tell you about ten things that happened at the museum. Nine of them really happened. Go ahead and try to guess what one is made up.

1. I got a call telling me that I missed the cut-off time for my SHG by one day and that the transfer will have to be pushed back a month.
2. Joseph pointed to a large plastic cow and said "Are visitors allowed to rub this cow?"
3. Elle found a pencil and drew on an exhibit.
4. Joseph was fascinated by an exhibit about Rosa Parks and made me read every single one of the 30 something panels out loud to him while Elle tried to climb on them.
5. Elle walked into the museum and said "This is boring! I don't like this building!"
6. Joseph looked at a exhibit about making butter and said "I didn't know butter was technologically advanced!"
7. As we were leaving the museum Elle said "This museum is not so boring after all! I like it here."
8. Joseph and Elle both asked me to buy them rubber balls that looked like popcorn in the gift shop. When I said no they both cried about not being able to get "cornballs".
9. Elle called a stuffed woodpecker a "hardpecker" and repeatedly yelled "I love hardpeckers!" despite my attempts to correct her.
10. Joseph told a museum employee "I like that exhibit about brown people riding the bus."

So, what one of those didn't really happen?