Can I use my will to name a guardian to care for my young children and manage their property?
Yes, you can use a will. That actually is the document that you would normally use to designate an individual to care for the person of your minor child, should something happen to you and the other parent.
In addition, with respect to the property that would go to a minor, you can set up a testamentary trust in your will. That will take care of that child’s money, via a trustee who can be appointed.