Fun on the swing set

So, Fiona and Eric were outside playing and I thought maybe I should check on them. I peek out and see this.

 

In case you can't tell, they have flipped that swing over and are riding it upside down. I let them carry on for awhile and then told them to flip it back. I'm not so sure that the manufacturers had that in mind when they made it. LOL I'd hate for the swing to break on them.