Need help with data arrays

Sorry to be a pain but I've just realised that I need to SUM two differnet types of data from the 'children' table - eg

PHP Code:

table parents
parents.id
parents.name

table children
children.id
children.parents
children.name
children.toytype
children.toys 


If the children table had a toytype filed then I need to separately SUM children.toys where toytype =1 and another SUM for where toytype = 2

How can I do that? Is it possible in one query?

Thanks again.