Any appliance that uses electricity can deliver a dangerous or even fatal shock. This is most likely with appliances that feature exposed heating coils such as space heaters and toasters. Any electric appliance with a worn or broken cord also can deliver a shock. Check cords periodically for damage, and never let pets or children chew on or play with them. Never stick a knife or implement into a toaster without unplugging it first. Particularly if there are children in the household, unplug appliances that are not used for long periods, and put caps onto unused outlets.