Hi all

I have a presentation to give and as part of it I want to create a standard graph which is simple enough. 

However, what I want to happen is that I speak for a bit, press the spacebar and the 1st bar of the graph pops up.  Speak for a bit more, hit the space bar and the 2nd bar of the graph comes up and so forth. 

I thought power point may have been able to do this but I can't get it to work in there.  Any suggestions on how I can achieve this and with what software???

Cheers