Bob Eager ) gurgled happily, sounding much like they were
saying :

The sign says "Parent and Child", he's with his parent. Where's the
problem?

Exactly the sign says parent and child not parent and young child .

So, do you define anyone (even you) who has a living parent as a
'child'?

If not their child, what relationship *are* you to your parents?

If the supermarkets don't say what they mean on the signs, how are we to
know what they mean?