When a witness gives evidence in an adversarial criminal trial, there are two main questioning phases: direct examination and cross-examination. Special provisions are sometimes made for children to give direct evidence, but the majority of child witnesses are still cross-examined. While several decades of research have demonstrated how to elicit children's direct evidence in a manner that promotes completeness and accuracy, the cross-examination process directly violates many of these principles. Here, we outline the characteristics of cross-examination, particularly as it pertains to children, and we review research about its impact on children, their testimony, and their credibility. We consider options for reforming the cross-examination process and propose avenues for future research. (Contains 1 table.)