Close up of pre teen boy standing at a workbench concentrating on screwing in a bolt while building a racing kart with his father, selective focus

indoors day sunlight two people man boy kid child adult middle aged 50s pre-teen african american ethnicity black caucasian mixed race person diversity father dad son childhood fatherhood one parent family happy concentrating building a racing kart go cart turning screw bolt making learning helping constructing togetherness teamwork working together bonding domestic life free time home garage hobby waist up backlit close up selective focus low angle slow motion handheld