B.C.
Child locks are only meant to slow them down enough for a parent to intervene before they get into something dangerous.
A playpen will slow them down too - but they will escape sooner or later.
You have to watch them like a hawk - they are lightning fast once they are mobile.
My Mom kept cleaning supplies in the high cupboards for years to keep them out of reach.
Giving him his own cabinet is not a bad idea.
Pots, small cans and tupperware are fun to play with.