We put in new sockets (tamper resistant electric receptacles) in our house - it is a little hard to push a cord in, but even if a child sticks a screwdriver into one slot, the socket is not active. It requires contact in both slots to activate. This was recommended by an electrician to us when our son was a baby, who demo'ed the feature with one active TR socket. So we redid all child-accessible receptacles. I believe new housing are now required to have these, but I am not sure.
We have a baby gate at the top of the stairs with an alarm - so even though our kids can operate the gate now (DD finally got the strength to push and pull the handle at 2.5), we have left it in place for now because it does keep them from rolling down when they are wrestling and it also alerts us when someone is going up or down the stairs.
