It'll take a minute or two for the voiceover to start up, (it does that automatically), depending on the speed of your broadband. 
    The stop/start control will appear to the right.
    This is one of the older stories, now rather out of date and probably politically incorrect, it was written long long ago for the school assemblies of small children. (That's when children are brought together as a group, not when you construct children from a kit of parts).