The Zusammebau is very easy. To operate 3 AA batteries are needed which are not included.
The operation of the device is somewhat louder than you would expect. Very timid kittens have thereto may not be as great joy. My two but love to chase the small plastic arm under the sheet quickly.
Tip: Also order a couple of batteries including charger. The cats like to play until complete exhaustion and often comes only after the batteries.
