diff --git a/js/wave-on-a-string/view/StringNode.js b/js/wave-on-a-string/view/StringNode.js
index 1d373f1..0280785 100644
--- a/js/wave-on-a-string/view/StringNode.js
+++ b/js/wave-on-a-string/view/StringNode.js
@@ -17,11 +17,10 @@ class StringNode extends Node {
   /**
    * @param {WOASModel} model
    * @param {Emitter} frameEmitter - Emits an event when the animation frame changes
-   * @param {Tandem} tandem
    * @param {Object} [options]
    */
-  constructor( model, frameEmitter, tandem, options ) {
-    super( { layerSplit: true, tandem: tandem } );
+  constructor( model, frameEmitter, options ) {
+    super( { layerSplit: true } );
 
     let stringShape = new Shape();
     const stringPath = new Path( stringShape, {
diff --git a/js/wave-on-a-string/view/WOASScreenView.js b/js/wave-on-a-string/view/WOASScreenView.js
index 83f19f5..f180420 100644
--- a/js/wave-on-a-string/view/WOASScreenView.js
+++ b/js/wave-on-a-string/view/WOASScreenView.js
@@ -227,23 +227,57 @@ class WOASScreenView extends ScreenView {
     const endNode = new EndNode( model, this.frameEmitter, {
       x: Constants.endStringNode,
       y: Constants.yStringNode,
-      tandem: wavePlayAreaTandem.createTandem( 'endNode' )
+      tandem: wavePlayAreaTandem.createTandem( 'endNode' ),
+      phetioComponentOptions: {
+        opacityProperty: {
+          phetioReadOnly: true
+        },
+        pickableProperty: {
+          phetioReadOnly: true
+        },
+        visibleProperty: {
+          phetioReadOnly: true
+        }
+      }
     } );
     endNode.windowNode.x += Constants.endStringNode;
     endNode.windowNode.y += Constants.yStringNode;
     this.addChild( endNode.windowNode );
     this.addChild( new ReferenceLine( model, tandem.createTandem( 'referenceLineNode' ) ) );
     this.addChild( endNode );
-    this.addChild( new StringNode( model, this.frameEmitter, wavePlayAreaTandem.createTandem( 'stringNode' ), {
+    this.addChild( new StringNode( model, this.frameEmitter, {
       x: Constants.startStringNode,
       y: Constants.yStringNode,
-      radius: Constants.segmentStringNodeRadius
+      radius: Constants.segmentStringNodeRadius,
+      tandem: wavePlayAreaTandem.createTandem( 'stringNode' ),
+      phetioComponentOptions: {
+        opacityProperty: {
+          phetioReadOnly: true
+        },
+        pickableProperty: {
+          phetioReadOnly: true
+        },
+        visibleProperty: {
+          phetioReadOnly: true
+        }
+      }
     } ) );
     this.addChild( new StartNode( model, this.frameEmitter, {
       x: Constants.startStringNode,
       y: Constants.yStringNode,
       range: Constants.yWrenchRange,
-      tandem: wavePlayAreaTandem.createTandem( 'startNode' )
+      tandem: wavePlayAreaTandem.createTandem( 'startNode' ),
+      phetioComponentOptions: {
+        opacityProperty: {
+          phetioReadOnly: true
+        },
+        pickableProperty: {
+          phetioReadOnly: true
+        },
+        visibleProperty: {
+          phetioReadOnly: true
+        }
+      }
     } ) );
     this.addChild( windowImage = new Node( {
       children: [ new Image( windowEdgeImage, {