Child care deduction for camps during school break

My daughter has attended Monday - Friday full day camps during her spring, summer & fall breaks, as both me & my wife work.  I read somewhere that the cost of these camps ($168/week X 3 weeks = $504 total) would be deductible on Form 2441, Child and Dependent Care Expenses.  These camps were run by the city we live in (City of Chandler Arizona), and I have receipts from these camps.  I currently don't have their EIN number, would I need to get this?  Thank you for your assistance.