In addition to the ideas listed above, here are some topics which have the potential for generating great discussions among young collectors.
How a coin is made—When discussing this topic, you may want to use the United States Mint H.I.P. Pocket Change™ Web site's "Birth of a Coin" cartoon to help give young children a basic understanding of how a coin is made.
The United States Mint—The United States Mint developed right along with the expansion of our young country. Consider giving the children a brief history of all the former and current United States Mint facilities and, of course, talk about what type of work was/is conducted at each one.
Learning about coins—What resources are available to help children learn about coin collecting? During one of your coin club meetings, you may wish to assemble at the local library and show your young members where they can find these resources. It would be very helpful to review how to use the resources effectively.
Organizing a collection and coin care—It's important to help beginning collectors understand what kinds of collections that they can develop (type, date, and theme sets, etc.) and how to best take care of the coins that they purchase.
Buying coins—What should you look for when buying a coin? Thing about inviting more experienced collectors to offer their advice to the young numismatists during one of your club meetings.
Inspecting your coins—How are coins graded? What contributes to a coin's value? Who can you turn to for grading assistance? Experienced collectors may vary in what they look for in a coin. Consider discussing these topics at a future coin club meeting.
What's in (or on) a coin?—Why are certain metal compositions used in American coin production? How are American coin designs decided upon? You may find that a comparative discussion about the production of American coins versus the coins of other countries would suit all of your coin club members.
Numismatic products—Think about allowing your younger club members to explore and present information about a specific numismatic product or type of product. Such products could include commemorative coins, tokens, medals, and more!
Exonumia—This is a fascinating extension of numismatics, and one that is sure to interest young collectors! If appropriate, help young collectors understand the kinds of objects fall into this collecting category (including tokens, medals, badges, medallions, etc.)
The history of coins—Consider inviting your club's young members to make presentations about different periods of time and the coins that were used during that period.
Scout badges—If any of your coin club members are involved in scouting, one idea might be to invite them to share with the group the work that they completed (or are working to complete) in order to earn a collecting badge. Visit the Scouts' Corner to learn how your members can earn badges.