Is it correct to use itself for a boy or girl?

Yes, it is correct to use "itself" for both boys and girls, but the context matters. "Itself" is typically used for objects, animals, or entities whose gender is not specified or relevant. For people, using "himself" for boys and "herself" for girls is more common and appropriate in most contexts, especially when referring to their actions or feelings. However, in discussions about gender identity or when using non-binary pronouns, "itself" might be considered acceptable for some individuals who choose it.