This seemed like a great mental challenge for my dog, and I believe it still could be but I wish I could somehow order replacement lids as she’s chewing them while playing the game. She doesn’t quite grasp the way it dispenses yet and in the process has chewed the lids and now they won’t screw on anymore. I have resorted to leaving them off, but I know it’s too easy then. Great concept but I think my dog lost interest due to frustration. I’d like to reintroduce with new lids. My advice, don’t give up if it’s not intuitive. Some dogs may need more time.