OK - I'll share one of my cats' favourite "purchased" toys......
Here's the manufacturer's site http://ca-en.hagen.com/Cat/Toys/50730
It's a toy that naturally draws other cats in to play together
....one on each end....and, who-knows-how-many-others in the middle!
Relatively cheap, too...just saw one for about $12 online. PJs Pets has them for about $20.....and - if you are (or know someone who is) of a certain age
....one day a month is seniors day....meaning a savings of 20%....new cost $16!
It's obviously, a takeoff of the always popular