The Ugears Mechanical Tellurion DIY model is a 3D representation of Earth's movements and its interplay with nearby celestial bodies. The kit comes with 249 parts and is rated "Medium," with an estimated construction time of 5 hours. Certain to appeal to anyone interested in space, astronomy, skywatching, or to those wanting to understand, or explain to a child the cycles that rule our lives: the transition of day into night, the seasons, the lunar cycle, even the construct of time itself. https