I like bringing kids to a coin show where they can search through stacks of paper money, or bins of cheap coins. Lots of dealers are also buying silver coins at melt price and will sometimes let kids search through their melt pile. Here's another idea! If you know the history teacher at the local middle school or high school, bring the teacher some flyers for a local coin show, and suggest the kids can get extra credit by attending the show and writing a paper on what they found of historical interest at the coin show. Kids can also join local coin clubs, or online facebook groups, if there interested in pursuing a coin collection. Whenever I show coins to kids, I also have them upload the Coinoscope application to their smartphone. This helps them identify and learn about the coins they are looking at.
Kudos to you for incorporating historic currency into your classroom work - you might consider purchasing a few of the old Germany hyperinflation notes from c. 1923-24 - they're plentiful and widely available for a few dollars each; they'd make good teaching aids for European history and even economics & finance - keep up the good work
Keep up the good work. IMO today's children spend too much time looking at screens. Someone needs to stir up their interest & imagination. If you can a few at a time interested in Numismatics, it would be great for our hobby's future.
And since were on the subject of teaching, seems like you do allot of military stuff ? thats right up my alley, here are some Examples of MPC (Military Payment Certificates ) from my Private collection.