give back children removed

Question

I have deleted all the children of the node, how do I add them again?

 func _physics_process(delta):
        if Input.is_action_just_pressed("ui_accept"):
            for i in get_children():
                remove_child(i)
        if Input.is_action_just_pressed("ui_cancel"):
            for i in get_children():
                add_child(i)

this code makes that when pressing a key I delete them and when pressing another attempt they return but it does not work

Answer 1

var childrens = []
func _ready():
  for i in get_children():
     childrens.append(i)
func _physics_process(_delta):
   if Input.is_action_just_pressed("ui_accept"):
     for i in childrens:
         if i.is_inside_tree():
             remove_child(i)
   if Input.is_action_just_pressed("ui_cancel"):
         if get_child_count() == 0:
             for i in childrens:
                add_child(i)

I found that this script returns some errors tho.

Answer 2

move/save children nodes to somewhere else, so you can reuse/readd them later