I suggest whatever you choose to do, keep it fun and interesting. Show in a practical way how money and the money systems play into everything they do. This will require plenty of creativity and additional work on your part.
By simply showing a fed made video, or having the complete a worksheet, or completing a checkbook register like they do in accounting, or receiving another talk/lecture...may work against you. So many of the financial problems our country faces today is due to fear of money, the money system, and banks (look at all of the pending mortgage failures, many sold to the buyer by a broker, and not through their bank). A bland or stuanch lecture or material will only reinforce that.
I don't repeat gossip, so listen closely...