It didn't take long before Frankie ripped the balls of the playmat. I guess the mat was made for smaller cats, as Frankie is 8 months old and almost full grown. Anyways, I fixed the mat by tying the balls to the arc with a band of higher quality. So now he can play as rough as he wants.
I don't have a picture of him ripping balls off, but here is one where he's just relaxing;