I was reading that thinking 'this sounds sensible' - until I found your daughter was 4
No. however hard 4 year olds might try, it is unreasonable to expect this of them. By 6 or 7 maybe, but until then it really doesn't sound a good idea. I'm sure at age 4 they are capable of running to tell teacher if they see her on the floor - but beyond that I really don't think so.
Good point about identifying the timescales they are talking about too.
Good luck. Hannah.