A small boy

A small boy wearing a peaked cap and thick glasses is pushing his mother along the pavement in a wheelchair. He is maybe 9 years old. He isn't pushing her in a very straight line; they almost collide with a pushchair, an old man, the wall. When there's an upwards incline he slows down and makes a greater angle between his legs and the chair. Every so often he leans down and puts his chin close to her shoulder so they can talk.