Not able to use redeemed funds

You may not be able to transfer the funds, but you can purchase a game through the Xbox store as a gift in order to use the funds and get your son a new game. Buying it as a gift will email his account a code to redeem and you would redeem that code on
his account.

When you purchase an Xbox gift card, make sure that the currency you use matches the currency associated with the recipient’s billing account. Otherwise, the recipient will be unable to redeem the gift card.

If you redeem an Xbox gift card in a country that doesn’t match the country associated with your billing account, you won’t be able to use those funds.

The funds in your Microsoft account can’t be transferred after you redeem your Xbox gift card.

You can’t use funds in your Microsoft account to purchase physical goods from online stores.

If you redeem a Microsoft or Xbox gift card in a country that doesn’t match the country associated with your billing account, you won’t be able to use those funds.

You may be able to redeem this for a gift card and add the money to your account and then purchase Xbox gold with the account funds.

The funds are tied to the account the card was redeemed on and cannot be transferred or used by a second account. You would have to add funds to the second account.