If a child is old enough to do a research paper, the child is old enough to learn to cite the sources for borrowed information, images, music, etc. At the same time, the youngest research paper writers shouldn’t be held to the same standards as high school-age writers when it comes to creating a bibliography page, but they can start listing their sources well enough for them or their teacher to be able to go back and find that source if needed.
This PowerPoint presentation on Citing Sources was