yeah I do worry sometimes - we have 3 levels here anf often as I'm running up or down the stairs I wonder what would happen if I fell.
FWIW if you can teach your children to dial 000 they have number tracing so even if thier speech isn't all that good or they can't say the address they can still track you.
DH's cousin rang 000 accidently when he was 1 (a couple of years ago) and the police came over to do a welfare check - they actually have to come inside the home in case it's an abduction or hostage situation.
I should teach Yasin this week because he knows his numbers (except 0 )