Ok, I will now study about testnet and it's whereabouts.

I could experiment with giving them small amounts of eth, or some token too for a matter of fact. But it will distract their thoughts about bitcoin and will make them think about this and not bitcoin. Bitcoin is the only real crypto currency that will last above all, I think all others just copied the way of functioning and came up with some useful thoughts introducing some shitcoin and made money off it. I want to introduce they only to bitcoin and it's nerwork.