Get inspiration from dogs that juggle (or help their owners juggles) on the worldwide web. Oh, they’re out there. And they’re amazing.
Play keep-away as you juggle, and your dog will likely go nuts for it! Also, you can juggle a couple of items (like toys), let them all fall, and watch your pup have a good time in racing around and trying to collect everything that’s rolling and bouncing. This may be better played outside.