Hold the world in your hands! Build a stellar mechanical model of the solar system including the sun and eight planets in this awesome hands-on STEM kit. Get artistic and detail each planet with colorful, realistic-looking printed planet graphics. Snap together the parts, then wind it up and set the planets in motion as they revolve around the sun! Plenty of STEM lessons are built right in. Gear ratios allow these model planets to revolve at different speeds, like the planets in our solar system. Discover how the planetary gear is used to simulate the mesmerizing motion of the solar system. Explore how the gears and the wind-up mechanism work to spin the model. Learn about the order of the planets, their relative sizes, their rates of revolution around the sun, their appearance, and more out of this world fun facts. Bonus: There’s a built-in expansion slot in case a ninth planet is discovered! This kit includes full-color step-by-step illustrated instructions for easy assembly. Plastic. Caution: Includes small pieces. 10” x 11” x 2 ½”. Ages 6+. Imported.