Abstract: According to the invention a solution is proposed of a current mounting problem in toy objects of plastics, primarily non-rigid plastics. The problem resides in that metal axles, rods or the like with associated details, e.g. wheels, cannot in a simple manner be mounted rigidly and permanently in its place in the toy object, on account of obstructing portions of the object. The solution proposed amounts to the axle (45) etc. being mounted in two steps, first in an opening (44") so located that no obstacle is met, then in a second opening (44') wherein the axle (45) assumes its intended final position. The two openings (44) are united by a connecting slot (46) whose width is less than the diameter of the openings so that the axle (45) can be forced along the slot while overcoming a slight resistance of deformation. In such a way the axle (45), possible with wheels (40) mounted, can be brought to assume its final position while circumventing the obstacle.