When people use an obscure reference of things that defeat time. They usually connect them with memories of childhood to adulthood and clocks that told them when they age(hey the day is over). The concept was to orchestrate items that everyone could relate to, such as a carrousel that strangely we connect with being stationary because we are not moving, but the act of spinning betrays that and thats when the ride slows and you get off. Kind of a symbolic symbol of a full life cycle, then again almost every ride could be one since you get a ticket.

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