We are not doing a science fair project this year, mainly because we have rather low-competition children, who prefer doing little unstructured projects year-round, but we have done so in the past. Ours have been almost entirely kid-directed, except for harassing them to do work, once they've committed to doing a project.
We will answer questions, and direct them to resources upon request, including driving them to various stores to purchase supplies (but nothing really expensive, unless one of the parents has an ulterior motive in purchasing it for parental use!). (Before they could type fluently, I did type up any accompanying research papers for them.)
