I keep my weapon in the holster most of the time. The trigger is covered and nobody in my house is going to sneak up on my and try to push the release button. My 4 year old daughter is very conscious of daddy's "safe side" and "dangerous side" as she calls them. When I unholster for bed, shower or whatever it goes straight into a biometric gun vault. There's no in-between. I won't even set it down outside the safe while I change clothes. If its never set down loaded outside the safe or holster then it will never be overlooked and turn into a tragedy.
I also make sure my daughter gets plenty of opportunities to see how it works. She knows where the mag release is and what it means when the chamber loaded indicator is sticking up. She knows the basic safety rules, and that she should leave it alone and go find a grow-up if she ever sees a gun laying around. My wife and I occasionally leave an empty (double checked by both of us) weapon for her to find to make sure she does as she's told.