Back in 2004, when most 4-year-olds are playing with dolls and having teddy bear tea parties, 4-year-old Marla Olmstead was taking the art world by storm. With some comparing her to Picasso, her brightly colored abstract paintings were selling for tens of thousands of dollars and the little prodigy was well on her way to become quite rich.

About three years ago, wanting to tell the fascinating story of this pint-sized prodigy and examine the world of abstract art, Amir Bar-Lev set about to make a documentary featuring the little girl. But something happened along the way and the resulting film, My Kid Could Paint That, leaves doubt as to whether or not Marla actually painted the works herself.

"I wish I could give you a clear answer to that," Bar-Lev told ABC News' Cynthia McFadden. "In my heart of hearts, I have a very hard time believing that a 4-year-old did all of those paintings. But I want to add that I have a very hard time believing that her parents would be behind an exploitation of their kid."

He says he didn't go into the project to discredit the family, but in the many hours he spent with the Olmsteads, he says he never saw her paint anything like the works she has become known for. Is she truly a prodigy or did her father, or someone else, help her create her works of art? The question remains unanswered in the film, which premiered at Sundance last year and opens this week in New York and Los Angeles.

The paintings, whoever did them, are beautiful. And while they do seem advanced for a child of that age, after taking this Is It Art? Quiz, I've discovered I am not a very good judge.