You can open this Outsmart Slide Lock by Safety 1st with only one hand, but your little explorer won't be able to open any cabinets, whether with one hand or two. The lock's real release button is hidden while a decoy button can be pressed to no effect.
OutSmart Slide Lock fits on both cabinet knobs and handle pulls
Adjusts to fit
Simple one-hand operation
Flexible surface hides functional buttons in plain sight