diff --git a/discord/ui/container.py b/discord/ui/container.py
index c9222262b..a804d1a91 100644
--- a/discord/ui/container.py
+++ b/discord/ui/container.py
@@ -124,8 +124,7 @@ class Container(Item[V]):
 
     def __init__(
         self,
-        children: List[Item[V]] = MISSING,
-        *,
+        *children: Item[V],
         accent_colour: Optional[Union[Colour, int]] = None,
         accent_color: Optional[Union[Color, int]] = None,
         spoiler: bool = False,
diff --git a/discord/ui/media_gallery.py b/discord/ui/media_gallery.py
index e3db92215..b86bbd0b4 100644
--- a/discord/ui/media_gallery.py
+++ b/discord/ui/media_gallery.py
@@ -68,15 +68,14 @@ class MediaGallery(Item[V]):
 
     def __init__(
         self,
-        items: List[MediaGalleryItem],
-        *,
+        *items: MediaGalleryItem,
         row: Optional[int] = None,
         id: Optional[int] = None,
     ) -> None:
         super().__init__()
 
         self._underlying = MediaGalleryComponent._raw_construct(
-            items=items,
+            items=list(items),
             id=id,
         )
 
diff --git a/discord/ui/section.py b/discord/ui/section.py
index 5d922a51a..ca4f1f2aa 100644
--- a/discord/ui/section.py
+++ b/discord/ui/section.py
@@ -75,8 +75,7 @@ class Section(Item[V]):
 
     def __init__(
         self,
-        children: List[Union[Item[V], str]] = MISSING,
-        *,
+        *children: Union[Item[V], str],
         accessory: Item[V],
         row: Optional[int] = None,
         id: Optional[int] = None,