A method of assembling an object using a component that has coded data on it, or in it. The climbing wall assembly has a plurality of adjacent wall panels, each having an exterior surface adapted for educational purposes and having a plurality of apertures for mounting hand hold structures. The sensors, although focused towards the interior of a building, do in not detect employees or traffic in the immediate vicinity of the fast-food service window thereby virtually eliminating the unintentional opening of the window. The obfuscating image is invisible from the first viewing and visible from the second viewing angle. supply voltage and a voltage threshold value can be generated, wherein the monitoring circuit is arranged to be controllable in respect of the generation of the signalizing signal, and wherein a control circuit is provided for controlling the monitoring circuit by means of at least one control signal.