Is it forbidden for a child to throw food on the floor—with the aim of teaching him to eat independently—if his parents instruct him to do so?

Children who are capable of understanding and applying table manners should be taught them. These manners include: washing hands before eating, praying for blessing, saying "Bismillah" (in the name of Allah) before eating, eating with the right hand and from what is directly in front of oneself with three fingers, picking up a fallen morsel, not eating while reclining, honoring bread and food and not criticizing it, and praising Allah Almighty after eating. A Muslim should adhere to these manners and raise their children accordingly.