So For costume designer what do you do in that class in college?

Costume designers often begin their careers as costume makers, with a bachelor's degree in costuming and a master's degree at the maximum. They might start by interning for university costume departments or working on college or community shows.

i think these large heads represent their gods and i do think they were worshiped by the people. if there was only one head and no heads around it i think it would be monotheistic but if there are several heads close to each other it could be polytheistic.