Make sure she knows how to count each coin in alike groups....so she knows 5 dimes equals 25 cents (show it that she can count by 5's), do the same with dimes showing her she can count by tens...once she knows how to do that much do what the first person who replied said...put 10 pennies next to a dime, 5 pennies next to a nickel, etc. After she grasps what each coin is equal to in pennies, randomly ask her questios like, "if I have 5 pennies, how many nickels do I have? If I have 1 dime, how many pennies do I have?" do it in the car, during bathtime, etc...things like this really help kids retain what they're learning. Just be sure that you make it fun, don't make it stressful. Money is a hard concept for kids to learn. When you go to the grocery store for something like a gallon of milk, pay cash and let her count out the money. So many parents only use debit/credit cards now that kids aren't even exposed to real cash! Fun things like this will really, really help make the abstract idea of money more concrete for her.