Explain to your child that when it comes to coins, size does not determine value. Lay out all the different types of coins, including quarters, dimes, nickels, pennies and half dollars. Discuss the value of each and the size relative to each. As your child becomes proficient identifying coin names and values, add in the gold dollar coins for fun. Also, an important point to note is that you should expose your child to all the varieties of coins. For example, in recent years, new versions of the quarter, nickel and dime have been placed into circulation. Make sure your child is familiar with these different varieties of the same coin.