When you install Play, you will have 5 simple scenes to learn with. Here are 5 tutorial videos to learn how to recreate those scenes.

1) Spinning Model

2) Click A Button

Click on an object to provoke an action by another object

3) Switching Materials

Using the Counter / Selector combo

4) Button as SubGraph

View of final Hierarchy and Control Graph:

Diagram inside the subgraph node:

Step-by-step video

5) Music Visualizer