Childproof outlets look just like traditional outlets, but they are far from it. These outlets offer a spring-loaded receptical cover plate that protects the electrical contacts, preventing the insertion of objects when unequal pressure is applied to the contact points.
For adults, the operation of these plugs is simple and does not require any special knowledge or training to operate. To insert a plug into the outlet, applying equal pressure to both sides of the outlet simultaneously while inserting the plug is all it takes to complete the circuit.
Nearly a third of accidents that involve children and electrical outlets happen when children insert common household items into a socket (often when adults are present).
These common items include keys, hairpins, paperclips, staples, plugs, jewelry, tools, nail files, belt buckles and knives.