W Schaum's above reminds me of the sign at entrance to garage section of flats where I used to live in Cambridge: CAUTION! CHILDREN PLAYING. Something to be very careful of indeed.
And a woman I know, finding on a bottle the instructions "Keep away from children" -- "Do not drink", remarked that she would find the second injunction easier to obey if she could find some way of managing to contrive obedience to the first.