Instructions
Examine the instructions if the child is building a pre-designed plane, car, or other machine or vehicle.
Organize the parts of the Erector set into key components, such as the main struts, connector pieces, and the individual nuts and bolts needed for the build.
Align the holes of the various components according to the instructions. Slide the small bolts through the receiving holes. Rotate the corresponding nut over the threads of the bolts. Tighten by hand, then finish tightening with the relevant wrench from the Erector set.