Super Moderator//Exceptional Service Award Recipient
You have two beautiful girls there.
Ms Purple head is a sky blue recessive pied.
Your other foster is a cobalt violet, yellow face type II dominant pied opaline budgie.
As for their age, I'd say they are both at the very least 6 - 7 months old. You can get more accurate info on their real age by checking their leg bands.
RIP sweet Tito (Summer 2008 - January 17th 2013).
You are missed and never will be forgotten.
The bands would usually have numbers and letters, but the year
the bird was hatched would be the last 2 digits of that year
i.e. 2016 would be 16 (stamped cross-wise on the band).
If you've had them not quite a year their band should have (16)
printed, when they were hatched. They're beauties.