Dom Cobb and his wife Mal created their own dream world for themselves. Until Mal began to believe that the dream world was real. Cobb performed the art of inception on her to make her realize that it was a dream. What Cobb didn't anticipate was that Mal would think the real world was a dream too. Mal kills herself to "wake up". Framed for her death, Cobb is on the run. When he fails to extract key information from the mind of businessman Saito, Saito strikes a deal with him: If Cobb can successfully incept an idea in the mind of Fischer, heir to a multibillion dollar empire, Saito will clear Cobb's name.
moviedragon
Answer: The answer above is solid and I agree, but there's another plausible way of looking at it. It is implied at the end that Cobb could still be dreaming (we never see if the top stops spinning). If that's the case, then he would likely dream his children to be exactly how he remembers them.
jshy7979