Any parent or grandparent can make gifts of up to $15,000 per year per individual person (child) and to as many individuals as they wish. Section 529 plans allow gifts to be made five years ahead all at once. Thus, a grandparent can gift $75,000 per grandchild at once for the next five years. If the grandparent has five grandchildren, then they have the ability to contribute $375,000 at once to the 529 plans, which are considered gifts. There would be no gift tax, assuming no other gifts were made to that child over those years.