Toy figures having a moveable appendage, an object associated with the toy figure at a first position, and a transfer mechanism configured to couple the moveable appendage with the object, and transfer the object to a second position on the figure. A replaceable extrusion die sub-assembly is mounted between the upper and lower shoes for extruding a workpiece into a preform. The direction of light scattered by the light scattering member is substantially constant during movement of the light scattering member guided by the guide member. Environmental information that affects electrical interaction between circuit elements in different levels of hierarchy is calculated at a lower level of hierarchy so that such calculations do not need to be made for each placement of a repeated cell and so that not all interacting elements need to be promoted to the same hierarchy level to compute the electrical interactions. There may be a plurality of in-feed conveyors 8 and a plurality of out-feed conveyors 9. The sliding element is slidably disposed on the main body, wherein a solid fuel is fixed on the sliding element.