[joeysteele]

There is no set law as to an age for babysitting, however there are recommendations from places like the NSPCC that no one under 16 should be left in charge of Children.
Obviously it is far safer too to leave them with a family member or at the very least someone who is well known to the family and children.

It is still it appears left to the common sense of the Parents as to who they leave their children with.
I looked after my Nephews and Nieces when I was 13 but only for a few hours.