diff --git a/animations/codelab_rebuild.yaml b/animations/codelab_rebuild.yaml
index 64133455ef..c31b1b74b4 100644
--- a/animations/codelab_rebuild.yaml
+++ b/animations/codelab_rebuild.yaml
@@ -821,8 +821,8 @@ steps:
                     child: _animationController.isAnimating
                         ? _animationController.value < 0.5
                             ? _previousChild
-                            : Transform.flip(flipY: true, child: widget.child)
-                        : widget.child,
+                            : Transform.flip(flipY: true, child: child)
+                        : child,
                   );
                 },
                 child: widget.child,
@@ -1001,8 +1001,8 @@ steps:
           -              ? _animationController.value < 0.5
           +              ? _animationWithDelay.value < 0.5
                              ? _previousChild
-                             : Transform.flip(flipY: true, child: widget.child)
-                         : widget.child,
+                             : Transform.flip(flipY: true, child: child)
+                         : child,
       - name: Copy step_04_d
         copydir:
           from: quiz
diff --git a/animations/step_04_a/lib/flip_effect.dart b/animations/step_04_a/lib/flip_effect.dart
index 8da50bd461..30d7b6b2dd 100644
--- a/animations/step_04_a/lib/flip_effect.dart
+++ b/animations/step_04_a/lib/flip_effect.dart
@@ -61,8 +61,8 @@ class _CardFlipEffectState extends State<CardFlipEffect>
           child: _animationController.isAnimating
               ? _animationController.value < 0.5
                   ? _previousChild
-                  : Transform.flip(flipY: true, child: widget.child)
-              : widget.child,
+                  : Transform.flip(flipY: true, child: child)
+              : child,
         );
       },
       child: widget.child,
diff --git a/animations/step_04_b/lib/flip_effect.dart b/animations/step_04_b/lib/flip_effect.dart
index a9b705529f..93a82d4d41 100644
--- a/animations/step_04_b/lib/flip_effect.dart
+++ b/animations/step_04_b/lib/flip_effect.dart
@@ -63,8 +63,8 @@ class _CardFlipEffectState extends State<CardFlipEffect>
           child: _animationController.isAnimating
               ? _animationController.value < 0.5
                   ? _previousChild
-                  : Transform.flip(flipY: true, child: widget.child)
-              : widget.child,
+                  : Transform.flip(flipY: true, child: child)
+              : child,
         );
       },
       child: widget.child,
diff --git a/animations/step_04_c/lib/flip_effect.dart b/animations/step_04_c/lib/flip_effect.dart
index a4a8527d14..0f3ab26b0a 100644
--- a/animations/step_04_c/lib/flip_effect.dart
+++ b/animations/step_04_c/lib/flip_effect.dart
@@ -76,8 +76,8 @@ class _CardFlipEffectState extends State<CardFlipEffect>
           child: _animationController.isAnimating
               ? _animationController.value < 0.5
                   ? _previousChild
-                  : Transform.flip(flipY: true, child: widget.child)
-              : widget.child,
+                  : Transform.flip(flipY: true, child: child)
+              : child,
         );
       },
       child: widget.child,
diff --git a/animations/step_04_d/lib/flip_effect.dart b/animations/step_04_d/lib/flip_effect.dart
index 0983cedef1..f21b8eac6a 100644
--- a/animations/step_04_d/lib/flip_effect.dart
+++ b/animations/step_04_d/lib/flip_effect.dart
@@ -76,8 +76,8 @@ class _CardFlipEffectState extends State<CardFlipEffect>
           child: _animationController.isAnimating
               ? _animationWithDelay.value < 0.5
                   ? _previousChild
-                  : Transform.flip(flipY: true, child: widget.child)
-              : widget.child,
+                  : Transform.flip(flipY: true, child: child)
+              : child,
         );
       },
       child: widget.child,
diff --git a/animations/step_05_a/lib/flip_effect.dart b/animations/step_05_a/lib/flip_effect.dart
index 0983cedef1..f21b8eac6a 100644
--- a/animations/step_05_a/lib/flip_effect.dart
+++ b/animations/step_05_a/lib/flip_effect.dart
@@ -76,8 +76,8 @@ class _CardFlipEffectState extends State<CardFlipEffect>
           child: _animationController.isAnimating
               ? _animationWithDelay.value < 0.5
                   ? _previousChild
-                  : Transform.flip(flipY: true, child: widget.child)
-              : widget.child,
+                  : Transform.flip(flipY: true, child: child)
+              : child,
         );
       },
       child: widget.child,
diff --git a/animations/step_05_b/lib/flip_effect.dart b/animations/step_05_b/lib/flip_effect.dart
index 0983cedef1..f21b8eac6a 100644
--- a/animations/step_05_b/lib/flip_effect.dart
+++ b/animations/step_05_b/lib/flip_effect.dart
@@ -76,8 +76,8 @@ class _CardFlipEffectState extends State<CardFlipEffect>
           child: _animationController.isAnimating
               ? _animationWithDelay.value < 0.5
                   ? _previousChild
-                  : Transform.flip(flipY: true, child: widget.child)
-              : widget.child,
+                  : Transform.flip(flipY: true, child: child)
+              : child,
         );
       },
       child: widget.child,
diff --git a/animations/step_05_c/lib/flip_effect.dart b/animations/step_05_c/lib/flip_effect.dart
index 0983cedef1..f21b8eac6a 100644
--- a/animations/step_05_c/lib/flip_effect.dart
+++ b/animations/step_05_c/lib/flip_effect.dart
@@ -76,8 +76,8 @@ class _CardFlipEffectState extends State<CardFlipEffect>
           child: _animationController.isAnimating
               ? _animationWithDelay.value < 0.5
                   ? _previousChild
-                  : Transform.flip(flipY: true, child: widget.child)
-              : widget.child,
+                  : Transform.flip(flipY: true, child: child)
+              : child,
         );
       },
       child: widget.child,
diff --git a/animations/step_05_d/lib/flip_effect.dart b/animations/step_05_d/lib/flip_effect.dart
index 0983cedef1..f21b8eac6a 100644
--- a/animations/step_05_d/lib/flip_effect.dart
+++ b/animations/step_05_d/lib/flip_effect.dart
@@ -76,8 +76,8 @@ class _CardFlipEffectState extends State<CardFlipEffect>
           child: _animationController.isAnimating
               ? _animationWithDelay.value < 0.5
                   ? _previousChild
-                  : Transform.flip(flipY: true, child: widget.child)
-              : widget.child,
+                  : Transform.flip(flipY: true, child: child)
+              : child,
         );
       },
       child: widget.child,