The floor of the nasal cavity in children is made of
High-Yield Explanation
"The floor of the nasal cavities, which also form the roof of the mouth, is made up by the bones of the hard palate: the horizontal plate of the palatine bone posteriorly and the palatine process of the maxilla anteriorly".(Refer: Nelson's Textbook of Pediatrics, SAE, 1st edition, pg no. 2007)