Just a few years ago the best outlet protectors were small plastic pieces that were inserted directly into the outlet.
The latest variety replaces your outlet’s face plate. 
They’re easy for adults to use – insert a plug and turn – and still protect your kids.
There is a wonderful website built by the City of Toronto for apartments for rent in Toronto with advice for electrical safety and protection: www.esasafe.com.
.
An illustration of an outlet replacement:
.
