X.O.
How many kids are in your care?
I am thinking that an assistant in a daycare center would probably be making about $10/hour. I'd try to offer the going rate.
Perhaps you could contact local daycares and ask the director how much (a $ range) their assistants are paid.
Edited to Add: I worked as an assistant in a daycare from 2001-2004 and was paid $8.10/hr.