In a will can you state that a child has to go to a college that meets certain guidelines in the will to receive any money?

This can absolutely be done. Under the direction of a lawyer, either use in a will with a testamentary trust or a stand alone trust. Either document you choose would need detailed provisions which set forth the specific requirements you are imposing on each child and what needs to be done to obtain the inheritance after the requirements are met. The trust language will establish a trustee to hold the money for your children, until your terms are satisfied, and will set forth the duties of the trustee in managing and growing the money until the children present a diploma or degree. It will also provide for contingencies such as the death of a child, before the money is distributed or the failure of a child to meet your requirements and what should happen to that share.