I am converting my comment on Jason R's answer to an answer and adding a few other points to consider. One reason for this is that his assertion that a trust can be set up for just a couple of hundred dollars leads me to believe that either he has no children for whom he needs to provide or that he and his spouse went in to the attorney with everything thoroughly thought out, and all questions answered.
With a spouse and minor child to take care of, you need to think of possible persons for three different roles. The same person could serve in all three capacities, but
you have indicated in the comments that you prefer to have different persons in
at least two of the three roles.
The executor of the will settles the estate of the deceased,
filing the will in probate court, settling all debts and claims against the estate, distributing the assets to the beneficiaries, one of which beneficiaries might be an
existing trust or one created by the will, and filing the estate tax return. Often,
the spouse is named as the executor, and usually an attorney is hired to handle all
the details and legalities by the executor. In other words, the executor does not
have to be an attorney him/herself. This process takes anywhere from a few months
to a year or more. Having an estate "open" for more than two years means that
either matters are a huge mess, or there is lots of money and very complicated
financial matters to settle. It is best to have at least one successor
executor named in case the executor declines the job at a time when one is no longer
in position to name another executor, and to guard against possibilities such as the
spouse and oneself dying at the same time (e.g. car accident). The executor of the
estate has no role to play once the assets of the estate are distributed and the
estate settled. Indeed, one of the last acts is to file a motion in probate court
saying that everything is taken care of as directed by the court, and requesting
a discharge from the executorship.
trust is created by the will or has been in existence previously, it often has language
saying that the income and assets are to support the spouse and minor children while the
spouse is living, minor children thereafter, and specifies how the assets are to be
settled upon the death of the spouse, or the children reaching adulthood etc. It
is the trustee of this trust who will invest the assets, disburse the income
(dividends and capital gains) at least once a year (the trust will have to file a
tax return and pay tax at corporate rates on any income not distributed to the
beneficiaries), and decide on how much of the assets should also be distributed
annually. For what it is worth, the assets will be received by the beneficiaries
as inheritance and no income tax is due while the income that is disbursed is taxable
income to the beneficiaries.
A legal guardian of the minor child(ren) needs to be appointed if the other
parent has passed on or dies at the same time. This is usually the person with
whom the child(ren) will reside, and who should be given funds to support the
child(ren), not just food and clothing but medical and dental bills (don't
forget their health insurance!), school fees, summer camp fees, vacation trips, etc etc.
As I mentioned in my comments, the trustee and the legal guardian may well
squabble over how much money is needed for appropriate support. Also, keep in mind
that probated wills are public documents that anyone can read, and if the trust
is set up in the will, then the terms of the trust are also public. On the
other hand, the terms of a revocable trust (as Jason R suggested you set
up) are not open to the public.
Finally, be aware that a lot of your estate might well be passing to the
beneficiaries outside of anything you say in your will. Specifically,
insurance policies, IRAs, 401k plans and the like, will pay to the
beneficiary that you have specified to them and you cannot change this
in your will and direct them to pay the money into the trust instead, etc.
On the other hand, there are other tax considerations that you should
take into account in changing the beneficiaries on these accounts.
So when drafting wills and trusts, be sure to take all these matters into
consideration, and change beneficiaries on insurance policies, IRAs,
401k's etc only when you are fully sure what would be the best way
to do things.