Hoverboards

Hoverboards are a means of travel in Tally's time. The hoverboards work with magnets, requiring some sort of metal beneath them in order to continue hovering. Tally and Shay often use mineral deposits in rivers and ancient railroads to travel outside of the grids of the city.

Crash Bracelets

Crash bracelets are bracelets that Tally and others wear while traveling on hoverboards that are designed to catch a rider before they can fall off their hoverboard.

Belly Sensors

Hoverboard riders use belly sensors clipped to their belly rings in order to tell the hoverboard where their center of gravity is located.

Interface Rings

People living in the city wear interface rings to help them interact with the many computers that operate everything from elevators to wallscreens.

Pretties

Pretties are a group of people who have had a special operation to change their looks to one specific set...