The Siku POLICE STATION AND A CAR FOR TRANSPORTING HORSES. The two-storey building can be assembled by following the illustrated instructions. Individual buildings can be assembled L-shaped, U-shaped or multi-storey buildings. The modular structure and stability of the push-fit system gives children room for creativity and promotes the development of motor and cognitive skills. In addition, it increase self-confidence and the ability to create without the help of adults. The fire station is compatible with other SIKUWORLD sets, but it is also fully as a stand alone.. A wall with parts of a puzzle system breaks when a detainee escapes.