yes we have one, Ds1 is told to stay in his bed and shout for us, if smokey he isnt to move so we can find him, dh and i will go get each child if alone ds1 told to stay in his bed until i come for him, we have 3 routes out of the upstairs 2 unlocked and 1 locked but dh and i know where the key is…. hope we never have to use it, but trying to teach ds to stay low and call out if we cant see him in smoke etc