Number of pieces
The total number of parts included in the delivery of the designer. At the same time, the calculation, usually, also takes into account the details that make up individual characters (torso, arms, legs, head, etc.) — despite the fact that the figures are most often delivered assembled and are not designed for disassembly during normal use . Also note that the kit may include several spare parts, in case of breakage or loss of any of the main elements.
Moving elements (mechanics)
Details and elements that, after assembling the designer, can move, but are not driven by a motor; in other words, moving parts that need to be moved manually. These can be, for example, windows and doors, hatches, screws, crane booms, etc. The exception is rotating wheels — in this case they are not considered moving elements.
Mechanical moving elements can be combined with motorized ones (see below).
Inertial motion
The possibility of movement of the assembled model in an inertial way.
In such models, the wheels are connected to a spring or other similar device capable of storing mechanical energy. To start, you need to pull the structure back so that the wheels turn, "charging" the spring. After that, it is enough to release the model — and the spring will spin the wheels, allowing you to drive a certain distance.
Inertial "motors" are simple, inexpensive, and can be quite fast. However their “charge” lasts less than a few seconds, but this cannot be called a serious drawback — launching inertial models can be quite fun.
