How we can leave a guardianship for our children?

In many states you and your wife can sign a Declaration of Guardian of Our Minor Children in Case of Need. A Will appointing someone executor is needed for someone to sell your goods, access your bank accounts and, if you have not designated a beneficiary, collect the life insurance proceeds.  Some lawyers include the Declaration of Guardian in the Will.  Because your children are minors, the Will should also provide that anything going to them will be held in trust until they are a certain age and that the trustee must make distributions for their health, education, maintenance and support.  The Will could provide that the executor will be the trustee or it could name someone else.