It’s empty in here!
My cats were absolutely thrilled from the second I turned it on.
We've had the play circuit for a while and the cats are a lot more interested when it has this blinking ball. Now there is finally a ball where you can change the battery! The ball is sturdy, but can also be opened easily to change the battery
Lights up very brightly, more than the 'normal' ball. The cats don't seem to know the difference though