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A ball is a 3D shape called a sphere, round all over.

A ball is a 3D shape called a sphere, round all over.

A sphere has no corners and no flat sides. Balls and oranges are spheres you can hold.

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A cube is a 3D shape with six flat, square sides. A cube is a 3D shape with six flat, square sides. A cone is round at the bottom and comes to a point on top. A cone is round at the bottom and comes to a point on top. A cylinder is a 3D shape shaped like a can or a log. A cylinder is a 3D shape shaped like a can or a log. A pyramid has a flat bottom and sides that meet at a point. A pyramid has a flat bottom and sides that meet at a point. Bubbles always float as spheres, the roundest 3D shape. Bubbles always float as spheres, the roundest 3D shape.