Behavioral skills training (BST) is effective for teaching safety skills but often requires a behavior analyst to conduct the training, which can make it costly and inaccessible for most parents or teachers. Parent-conducted BST may allow for children to receive training without the need for a trained behavior analyst. However, providing parents with training can often be difficult. Manualized training from a website could allow parents access to needed material at a low or no cost. This study evaluated a web-based manualized intervention implemented by parents for teaching firearm safety skills using BST. First, BST experts and parents validated the web-based manual. Next, we used a multiple-probe across participants design to assess the effectiveness of parent-conducted BST. Results indicate that three children acquired the safety skills after parent-conducted BST alone, and the other three children required experimenter-conducted IST. The advantages of parent-conducted BST, limitations, and areas for future research are discussed.