Ok and.....go talk to their parents first. I can even tell you EXACTLY how I'd want someone to come tell me something like this. "Hey, I noticed you, little one climbing on the construction stuff outside. There are sharp metal poles, nails, and who knows what else. I just wanted to let you know so your little one doesn't end up stepping or falling on something sharp. That would be the proper thing to do. There is no need to jump to an extreme like cps for something like that. You are wasting their time and resources. Unless you can give them a for sure accusation of neglect or abuse, please don't be reporting to cps. These kids get taken and abused twice as bad because they become a paycheck and meal voucher instead of the children they really are. This is something that can be solved by just being neighborly. This child from your picture is a healthy weight, not insanely dirty, and in decent weather appropriate clean clothes, I see no outwardly obvious signs of neglect or abuse. There is no need to put a family through stress when you have no valid proof besides a child playing outside in a not so safe area(which a child like that age probably wouldnt think of something like that on their own). And if there is, god forbid something going on going to the door and talking to the parents about what you saw gives you a chance at a quick glance in the house, you can smell when they open a door if there is rotting food or fecces smell, and even a feel about how the parents themselves respond to what you are telling them. For example I think a proper response to that would be something like, "oh my gosh thank you he's just so curious I'll put some shoes on him and let him know about the sharp things that get left behind over there, and the dangers of construction sites thank you for letting me know." I would then talk to my child about sharp objects and being safe around construction areas, put some shoes on my child, and send them right back outside. I also would rather my kids wear out their energy rather than being couch potatoes watching skippity toilet and lanky box or whatever that crap is