Today, Franny completed a 200 piece puzzle.  She has been doing 100 piece puzzles for over a year, so I had her pick out a larger puzzle that she would want to do.  I had expected to have to help her some, but she did the whole thing without a problem.  It did take a long time—she basically completed it in three different sessions throughout the day, but she did do it all herself.  I was very impressed!