If you are new to Cabri 3D, it's a good idea to work through the introductory demo. This will show you how to use the tools in general, how to change the view angle, and how to drag. These are all important in creating motion. In particular, animation is based on points which can be dragged on certain paths.

On an empty area of the file to the right, right-click, hold down and move the cursor to change the view angle and hence find the object hidden by the cube.

Now drag the cube out of the way (left-click on it, hold down and move the cursor to drag) and then find the draggable points on or near the object which is revealed. How does dragging these change the object?