diff --git a/src/app/dev/DevToys.Api/Tool/GUI/Components/IUICard.cs b/src/app/dev/DevToys.Api/Tool/GUI/Components/IUICard.cs
index e70e30e60a..c3eaf01a99 100644
--- a/src/app/dev/DevToys.Api/Tool/GUI/Components/IUICard.cs
+++ b/src/app/dev/DevToys.Api/Tool/GUI/Components/IUICard.cs
@@ -1,7 +1,7 @@
 namespace DevToys.Api;
 
 /// <summary>
-/// A component that represents a empty card and <see cref="IUIElement"/> for the option value.
+/// A component that represents an empty card and <see cref="IUIElement"/> for the option value.
 /// </summary>
 public interface IUICard : IUIElement
 {
@@ -12,7 +12,7 @@ public interface IUICard : IUIElement
 }
 
 [DebuggerDisplay($"Id = {{{nameof(Id)}}}")]
-internal class UICard : UIElement, IUICard
+internal class UICard : UIElementWithChildren, IUICard
 {
     internal UICard(string? id, IUIElement uiElement)
         : base(id)
@@ -22,6 +22,11 @@ internal UICard(string? id, IUIElement uiElement)
     }
 
     public IUIElement UIElement { get; }
+
+    protected override IEnumerable<IUIElement> GetChildren()
+    {
+        yield return UIElement;
+    }
 }
 
 public static partial class GUI
diff --git a/src/app/tests/DevToys.UnitTests/Tool/GUI/Components/UIElementWithChildrenTests.cs b/src/app/tests/DevToys.UnitTests/Tool/GUI/Components/UIElementWithChildrenTests.cs
index 13edb16620..76b56f4346 100644
--- a/src/app/tests/DevToys.UnitTests/Tool/GUI/Components/UIElementWithChildrenTests.cs
+++ b/src/app/tests/DevToys.UnitTests/Tool/GUI/Components/UIElementWithChildrenTests.cs
@@ -72,4 +72,18 @@ public void GetChildElementById_ReturnsFirstMatchingChild_WhenMultipleChildrenWi
         );
         Assert.Equal(child1.Object, element.GetChildElementById("child"));
     }
+
+    [Fact]
+    public void GetChildElementById_ReturnsChild_WhenChildIsCard()
+    {
+        var child = new Mock<IUIElement>();
+        child.Setup(c => c.Id).Returns("child-id");
+
+        var card = new UICard("card-id", child.Object);
+
+        var element = new TestUIElement("parent", new List<IUIElement> { card });
+
+        Assert.Equal(card, element.GetChildElementById("card-id"));
+        Assert.Equal(child.Object, element.GetChildElementById("child-id"));
+    }
 }