You don't say how old your daughter is, but if she only has a few teeth, i'm assuming around 2 years old.
Radiographs have the purpose of allowing us to "see" in areas that are not visible (between the teeth, in the bone, etc). Dentists will take them to ensure a thorough exam is given to the patient, or when they need to examine a particular problem.
Dental radiographs are very, very low in strength and are non-harmful to the patient when taken for diagnostic purposes.
That being said, i doubt your dentist will see a need to take them at her age since her teeth are probably in great shape, no cavities to be found. Ask him/her at the visit if they plan on taking the films and why. You do have the right to refuse the films if you wish.