An animal toy features the ability to connect two or more separate toys of varying shape, size, color, andor texture, together to create larger and more complex toy systems. The drill head can be inclined to either side and a holding device is provided for the two lenses of a pair of glasses, in which holding device the opposite edge regions of the lenses are accessible to the drill bit of the dual head. Each transport-layer mechanism resides in a dynamically loadable module and implements a specific area of transport-layer functionality. The second local exchange carrier has control over the first switch to connect or disconnect it from the distribution network. Polymer polyols comprising ethylenically unsaturated macromers and a process for their preparation are also described.