Simply load the car with a dump truck. The model can be disassembled into individual parts at any time with the help of the attached screws, it is possible to replace the wheels with alternative wheels.
The model should practice children's motor skills, control of tools (screwdriver and screws) and at the same time involve them in playing with the model.
This is the first model in the series, where several more models in a similar spirit are planned to be used. Watch my new models and have fun :)

Recommendation:
after printing the individual parts, check whether there are no sharp edges on the model, residues after printing, remove these with an edge-knife, file, or sandpaper.
Use a screw: if the screw is to be screwed into the model, I recommend using a little strong dry soap or soapy dry crack on the screw - excessive force can destroy the model, dry soap can help.