once you get the hang of pressing two locations simultaneously to unlock the system, it will. My cupboard handles are a bit special since just have 3 small holes "Deco" and the plastic rod is fine enough to pass through the middle. The system is far too high so that my children can access them, but even they would have access, I doubt they can open a system that requires two simultaneous actions with enough force. So, as they only have a year I serene.