diff --git a/js/common/model/IdealGasLawModel.ts b/js/common/model/IdealGasLawModel.ts
index ddffd318..a0ff427a 100644
--- a/js/common/model/IdealGasLawModel.ts
+++ b/js/common/model/IdealGasLawModel.ts
@@ -166,7 +166,8 @@ export default class IdealGasLawModel extends BaseModel {
     if ( options.hasCollisionCounter ) {
       this.collisionCounter = new CollisionCounter( this.collisionDetector, {
         position: new Vector2( 40, 15 ), // view coordinates! determined empirically
-        tandem: tandem.createTandem( 'collisionCounter' )
+        tandem: tandem.createTandem( 'collisionCounter' ),
+        visible: true
       } );
     }