Give each child an envelope. This will serve as their "wallet". Allow the children to decorate the wallet as they wish, as long as their name is clearly written somewhere on the outside of the envelope. Give each child a nickle and a penny to put in their wallet. As you give the students the "money", explain the values of each coin. In fact, it may be a good idea to practice counting by ones and fives as you pass out the change. Explain that when students count pennies, they are counting by ones. When they count nickles, they are counting by fives. Each student should now understand they each have six cents.
Give each item you purchased a monetary value. For instance, erasers may be ten cents, pencils fifteen, etc. Students will have to earn "money" to purchase these items. Keep an example of these items in view of the students so they have a visual aid to motivate them as they complete their assignments.