title: Create clickable objects with helix toolkit
body: <p>I found on the Helix Toolkit an example, which is called to ScatterPlot, which is really close what I really need. But I can't find anything about how can I add something onclick event listener to the created objects (in this case to the sphere). This adds the sphere to the 'playground'.</p>
  
  <pre><code>scatterMeshBuilder.AddSphere(Points[i], SphereSize, 4, 4);
  </code></pre>
  
  <p>The basic goal is to add every sphere an onclick event listener and when the user choose a color and click one of these spheres it will change to the selected color. It's possible to add onclick listener (or something equal with it) to the spheres.</p>