Child Modelling - Specialist Agencies?

Hi There,
A friend of mine is keen to see if her girls can become part time models (age 10-13) , Its not an area I'm familiar with.
So apart from googling for agencies would anyone have any other tips?
Luckily this is not the only thing they want to do, do it should stay quite balanced within their lives.
Thanks,
Stuart
A friend of mine is keen to see if her girls can become part time models (age 10-13) , Its not an area I'm familiar with.
So apart from googling for agencies would anyone have any other tips?
Luckily this is not the only thing they want to do, do it should stay quite balanced within their lives.
Thanks,
Stuart