I hide the dialer deep in the menu. I also keep the phone on airplane mode. To accidentally call 911 they'd have to find the dialer, and press 9-1-1 in the ri

I hide the dialer deep in the menu. I also keep the phone on airplane mode. To accidentally call 911 they'd have to find the dialer, and press 9-1-1 in the right order. At this point they're old enough to know better, and before they were old enough, they didn't know what it was, so doing it maliciously would be unlikely. Also since the phone is on airplane mode, they'd also have to disable that first, because even emergency mode doesn't work in airplane mode.