DH and I have been saving regularly for DS (4), including Christmas and birthday money, by the time he reaches 18 there could be £70k in the account. My intention for this money is for HE or house deposit etc. Now I know that this money it technically his but I don’t want an 18 year old having access to this kind of money to piss up against a wall. I’m thinking of putting the money into a 5 year bond when he is 17 so that by the time the bond matures hopefully he will have matured too. Is this the best option or is there something else I could do?