Is a jewish girl over bat mitzvah obligated to drink the four cups of wine on pesach??

My neice is a really picky eater, and drinker. She hates a ton of foods. And on pesach, she never drinks the four cups of wine, because she hates wine and g juice. And she doesn't drink g juice on the sabbath. And she won't do the "dip your pinky in the g juice for the 10 plagues" thing on pesach, eihter, because she won't even touch g juice. Is she obligated to do these things once she becomes bat mitzvah? (12)