The following menu has 2 levels. Use left and right arrow keys to navigate between menus. Use up and down or left and right arrow keys to explore within a submenu. Use enter to activate. Within a submenu, use escape to move to top level menu parent. From top level menus, use escape to exit the menu.
https://wam.org/event/drop-in-sculpture-tour-of-the-art-garden/
https://wam.org/event/friends-of-wam-mini-used-book-sale11/