Liz - i had that exact problem, DS would 1/2 pull out something from the socket and try to touch the pins that were still in the socket - a great way to electrocute himself.

We got these like plastic bubbles and sit over them, with a hole for the cord to come out of.. They are great, only problem is you can't have a double adapter or anything in the socket - just 2 plugs.

Our were made by a company called Micky HaHa (they have a website - all one word with .com.au afterwards), they were $11 each, but worth it, or my brother says they have them at bunnings (not sure if same brand), for like 1/2 the price.

HTH!