Vorneweg - the cats are asking us to play with them and to hide things in the tunnel. That was not always so. First you had the tunnel completely ignored the weeks went like this. Probably had the tunnel have only accepted the "herd odor", so that he could be "taken up". Today is hidden inside or waited and attacked. Therefore, please do not lose patience, sometimes the cats need some time to a toy to discover for themselves. Definitely also suitable for larger cats. Agree price / performance.