Close up of pre-teen boy concentrating leaning down to concentrate 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 concentrating standing building a racing kart go cart turning screw bolt making learning helping mentoring constructing togetherness teamwork working together bonding domestic life free time home garage hobby waist up backlit close up selective focus slow motion handheld