So, since Hades likes putting his pom poms in any available box and batting them around, I've been figuring that head love one of this ball puzzle toys. So I got him one. He loves it! But it came with a ball that is motion activated... and chirps like a bird... It comes out, but the kitty-kids adore it. Neither Rune nor I can stand it. It's got another ball which doesn't come out. Can I kill the chirpy bird by removing the batteries? Or should I just let the kids have it for a certain amount of time each day?