Microtech Ultratech

“Most knives with a secondary lock that I’ve seen also lock it closed. But they’re designed for easy access so idk how effective it would be with small children. Sounds counter intuitive but your best bet is probably an OTF. Especially if you get a first or second gen of something like Microtech or Heretic. Every adult I’ve handed any of mine to struggle to open them because you have to overcome the switch before it fires. It’s very smooth and easy if you know the knife, but most people struggle. You could go old fashioned with something like a Buck 110 or slip joint. Two hand open. But really any knife is designed to be opened. Just how it is and kids are smart. Have you considered teaching knife safety as a primary intervention? Safety training has been shown to be more effective in children than avoidance but that’s a personal parenting decision.”