diff --git a/playground/samples/customObject.js b/playground/samples/customObject.js
index <HASH>..<HASH> 100644
--- a/playground/samples/customObject.js
+++ b/playground/samples/customObject.js
@@ -6,7 +6,11 @@ function ObjectFieldTemplate({ TitleField, properties, title, description }) {
       <TitleField title={title} />
       <div className="row">
         {properties.map(prop => (
-          <div className="col-lg-2 col-md-4 col-sm-6 col-xs-12">{prop}</div>
+          <div
+            className="col-lg-2 col-md-4 col-sm-6 col-xs-12"
+            key={prop.content.key}>
+            {prop.content}
+          </div>
         ))}
       </div>
       {description}
Fix customObject sample (#<I>)

The sample for customObject.js had few defects. React <I> throws an
no-keys-defined warning as well as 'child-can-not-be-objects'
exception. The code has been changed to fix these issues.

* Fixed customObject sample to fix "Objects are not valid as a React child" error for react <I> and to avoid "<URL>