@CharlieSays13 just write a big check list and slot in answers as they speak (you will forget otherwise) then ask any remaining questions at the end.
It really depends how old the child is/children are.
I'd want to know....
Their history, why they came into care?
Any issues around health?
Any known issues around attachment, etc?
What the relationship is like with foster carer/s?
How their sleep patterns are (good, bad etc)
Were they a good eater/fussy eater?
Behaviour, routine etc.
Their birth family situation.
Do they have siblings?
Would there be letter box contact/any expected contact?
The older they were there would be more questions about friendships/school or pre school etc.
I expect they will tell you all this and it may prompt more question. Think always when/how etc . So medical issues when did it start/ how is it being treated, etc.
Good luck. 