Our cats are 1 year old and want to be entertained on a regular basis and they are the toys quickly become boring. The construction of the rail was super simple, an instruction manual was even here, the rail can be plugged together different; Serpentine, S-shape ... we decided for the circle. From the processing and handling ago, the rail is far too great. After the two cats have the new thing a bit reluctant patterned, they are but then came more and more momentum and kloppen mitterweile properly the ball off the then hunts in breakneck speed through this track. :) So far, the two have a lot of fun with it, be able to deal with it just sometimes alone and it seems to them (yet) to be boring. For the price a great toy that you also always can put different and the cats which sometimes can employ themselves. TOP!