Abstract: A three-dimensional jigsaw puzzle comprising a base, a post fixedly secured to and emanating upwardly from the base, a first group of pieces, where each piece in the first group has a through-bore to enable stacking about the post and also has at least one radially extending projection in a shape of a trapezoidal solid, and a second group of pieces, where each piece in the second group has at least one radially extending projection in the shape of a trapezoidal solid. The first and second groups of pieces are operatively arranged to stack and interlock with one another to form a cylindrically shaped structure.

Abstract: A three-dimensional jigsaw puzzle comprising a base, a post fixedly secured to and emanating upwardly from the base, a first group of pieces, where each piece in the first group has a through-bore to enable stacking about the post and also has at least one radially extending projection in a shape of a trapezoidal solid, and a second group of pieces, where each piece in the second group has at least one radially extending projection in the shape of a trapezoidal solid. The first and second groups of pieces are operatively arranged to stack and interlock with one another to form a cylindrically shaped structure.