Yes you have the same amount in BCH as in BTC.
BUT only if you had your BTC not in a online wallet.
If you held them in a paper wallet (like the one you made for your son) or in one of the local ones (electrum, btc core, mycelium and what not) now you do have doubled your coin amount (yaaaay).
If you want to spend your newly BCH you have to export your private keys and use them in a BCH supporting wallet.
I would recommend to wait since the new wallets havent been tested and could potentially be used for phising your private keys.