Three kids, one ball, not very much space. One goes in goal (if needs be a jumper or coat on each side), the other two compete to put the ball past them x times

Three kids, one ball, not very much space. One goes in goal (if needs be a jumper or coat on each side), the other two compete to put the ball past them x times, then rotate the goalkeeper. Continue ad nauseam. Or go to a park and practice ball skills, solo. Ex-England captain Wayne Rooney was famous for having done that for hours at a time as a kid. I'm not actually a particular soccer fan and quite enjoy basketball, but it's definitely not true that soccer has higher kit, space or numbers requirements to get in a game as a kid.