Others go to yoga classes. Baby yoga is becoming very popular in the U.S. now. Maya brings her eight-month-old daughter, Marina, to yoga class once a week so they can exercise together. Maya says, "I used to go to yoga class before Marina was born, but now we can go together." She adds, "The classes are fun for Marina, and for me, too." other people take exercise classes with their babies in pools. These water classes are very popular, too. In these classes, young infants and their parents exercise in the water. Adam Park and his three-month-old son, Max, take a water class together every week. Adam says, "Max is not only learning to love exercise, but he's learning how to swim in the water, too." Doctors agree that it's a good idea for parents and children to exercise together. These classes help parents spend more time with their babies, and the babies learn to enjoy exercise