Our babysitter pointed out to us this weekend that our 4yo can open our "babyproofed" hall cabinet that contains medicine. LO went in the cabinet to get a bandaid (and fortunately not to eat medicine). Most is in childproof containers but some like Tums and random supplements are not. DH and I were surprised and disturbed by this so the next day we bought a few different locks and she can undo them all easily. Crap. Any suggestions for locks I can open but a 4yo can't? We have smallish side by side knobs on those cabinets and under the sink.
At what age do you stop proofing and let them be? Not that I think we're there, especially with LO2 at age 2.