When childproofing, don't forget electrical cords and other hidden dangers.
Electrical Cord Safety
Photo (c) Marilyn Nieves
In addition to pulling this electrical cord out of the outlet and then putting something else into the outlet and getting a shock, your child could pull on the other end and have a heavy appliance fall on him.
Be sure to keep electrical cords out of reach of your children when childproofing your home.