diff --git a/js/common/view/PlinkoProbabilityCommonView.js b/js/common/view/PlinkoProbabilityCommonView.js
index 3017c938..0339659e 100644
--- a/js/common/view/PlinkoProbabilityCommonView.js
+++ b/js/common/view/PlinkoProbabilityCommonView.js
@@ -118,10 +118,10 @@ define( function( require ) {
     this.addChild( board );
     this.addChild( ballsNode );
     this.addChild( eraserButton );
-    this.addChild( soundToggleButton );
-    this.addChild( resetAllButton );
     this.addChild( histogramNode );
     this.addChild( hopper );
+    this.addChild( soundToggleButton );
+    this.addChild( resetAllButton );
 
     // Hide BallsNode when the hopper mode is not 'ball'.
     // unlink unnecessary since this instance exists for the lifetime of the sim.
diff --git a/js/intro/view/IntroScreenView.js b/js/intro/view/IntroScreenView.js
index 5a5f7981..68a9b24d 100644
--- a/js/intro/view/IntroScreenView.js
+++ b/js/intro/view/IntroScreenView.js
@@ -72,8 +72,8 @@ define( function( require ) {
     } );
 
     // rendering order
-    this.addChild( histogramModeControl );
     this.addChild( playPanel );
+    this.addChild( histogramModeControl );
     this.addChild( numberBallsDisplay );
     this.addChild( pegsNode );
     this.addChild( cylindersBackNode );
@@ -117,6 +117,10 @@ define( function( require ) {
         }
       } );
     } );
+
+    // a11y
+    // set tab order
+    this.accessibleOrder = [ playPanel, histogramModeControl, this.eraserButton ];
   }
 
   plinkoProbability.register( 'IntroScreenView', IntroScreenView );