I have been teaching some kids about crypto and it is an enjoyanble experience. It's like playing with play money.
If it is enjoyable for the kids, it is okay. But I don't see the way that it is can be a fun activity as playing play money.
I made a suggestion before to do not use it as a real dogecoin but using Testnet (dummy coin). however, even doge the Testnet faucet unavailable right now, I suggest OP use bitcoin or another altcoin such as Ethereum. when using Tesnet, you do not worry if your child makes some mistakes.
1.
https://coinfaucet.eu/ - bitcoin testnet faucet
2.
https://faucet.ropsten.be/ - ethereum testnet faucet