Suburbia is full of children you rarely actually see, but their traces are everywhere once you look. Chalk drawings fading on a drive, a trampoline rising over a fence, a basketball hoop bolted above a garage, a scooter dropped mid-lawn, a single lost glove pushed onto a railing by a passer-by. Photograph the evidence rather than the child.

Look for: the objects left behind, the marks and the toys, the abandoned game frozen where it stopped. No children in frame are needed, which keeps the project simple and considerate.

Best time: after school and at weekends, or the quiet just after everyone has gone in.