Who named the child?

It is the parents' names that help children write and sign, because children can't write themselves, so they can sign their parents' names when signing.

Of course, you can also sign the child's name, because after all, this thing is written in the child's name. If you want to be strict, you can sign the author's name or the parents' name.

If you sign, you can use the name of the ghostwriter as the standard, or you can use the standard of the name of this thing to decide whose name to sign. Generally, someone else's name is signed. If there is any relevant responsibility for this matter, someone will be found.

So just sign the child's name and the parents' name. Finally, if you have the responsibility, you will find your parents. So the final conclusion is that it is better to sign the parents' names. If you don't want to sign, you can also sign the child's name directly.