First Words!?!

On Saturday afternoon, Cooper started babbling and out came ma-ma!  We weren't sure if that was what he was saying, so I said ma-ma and he immediately imitated me with ma-ma-ma-ma.  He continued to say it through the evening and all the way to lunch yesterday, he said ma-ma-ma-ma in the backseat.  I suppose this counts as his first word even though he doesn't know what he is saying???  Next up, da-da or Jayhawk?...working on both :)