diff --git a/js/coins/view/InitialCoinStateSelectorNode.ts b/js/coins/view/InitialCoinStateSelectorNode.ts
index 247c8a5..62a9f79 100644
--- a/js/coins/view/InitialCoinStateSelectorNode.ts
+++ b/js/coins/view/InitialCoinStateSelectorNode.ts
@@ -110,7 +110,7 @@ export default class InitialCoinStateSelectorNode extends VBox {
       stroke: null,
       yMargin: 10,
       minWidth: 270,
-      visibleProperty: preparingExperimentProperty,
+      visibleProperty: preparingExperimentProperty, // TODO: Gated visible prop, see https://github.com/phetsims/quantum-measurement/issues/28
       tandem: radioButtonGroupTandem
     } );
 
diff --git a/js/common/QuantumMeasurementConstants.ts b/js/common/QuantumMeasurementConstants.ts
index b698736..94b9dc5 100644
--- a/js/common/QuantumMeasurementConstants.ts
+++ b/js/common/QuantumMeasurementConstants.ts
@@ -22,9 +22,11 @@ const QuantumMeasurementConstants = {
   KET: '\u27e9',
   COIN_SET_AREA_PROPORTION: 0.9, // Side of the explicit coin area with respect to the measurement area
 
-  HOLLYWOODED_MAX_COINS: 400, // This number should be used when *showing* fewer coins than the max allowed.
-  HOLLYWOODED_MAX_COINS_RADII: 2
+  HOLLYWOODED_MAX_COINS_RADII: 2,
+  HOLLYWOODED_MAX_COINS: 400 // This number should be used when *showing* fewer coins than the max allowed.
   /**
+   * TODO: Temporary list of square numbers for the hollywooded number of coins above. https://github.com/phetsims/quantum-measurement/issues/39
+   * N  N*N
    * 20 400
    * 25 625
    * 30 900