I got a idea that why not give them some satoshis and ask them to try it themselves: send, recieve or store.
Since doing these operations on Bitcoin network is either expensive, either slow, there are 2 other directions I'd think of:
1. Teach the users play with testnet. Both Bitcoin Core and Electrum do work with testnet and one can see how everything works.
2. Try the operations on the network of a cheap altcoin that works pretty much similar to Bitcoin. For this I'd recommend Dogecoin.
Of course, the downside is that the users don't play with the real thing, the so much valuable Bitcoin.
Still, it's an idea...