Originally Posted by LadyBlakney

Remember that this scene took place inside Harry's head, so the scaly baby was Harry's perception of Voldy's soul.
As for why V's body was left in tact this time, I think it's because all his horcruxes had been destroyed. The 1st time, his body was destroyed because Avada Kedavra couldn't really kill him, so it destroyed his body instead.
I hope this makes sense.