INSTRUCTOR AMANDA WALDEN, left, spins a Hula-Hoop on her hand on Sunday during an all-ages class at Bath Dance Works on Front Street. Walden, who also makes the hoops, holds the classes on the second Sunday of the month at 2 p.m., followed by a Hula-Hoop jam at 3 p.m. A mix of fun, dancing and exercise, participants can burn upward of 400 calories in the hour session. The cost is $10 per person for the class and jam; $5 for just the jam. Walden also teaches Hula-Hoop dance through Merrymeeting Adult Education. 2p1.jpg