You can leave your house in trust, so your husband can live there during his lifetime, but then it goes to your children. Its value can’t be taken for care fees whilst he still lives there if he is over 60, but a charge could be out on it, to be recovered when you die.
You can each leave your other assets to your own children, or whoever you wish, but do consider whether the surviving spouse will have enough to live on and run the home without the other’s income.
A good solicitor will ask all the right questions to cover all What Ifs? And write a will accordingly.
The worst thing you can do is not have a will. Or to have one which no longer reflects your wishes.