180-piece colorful agate wooden wooden mind exercise challenge - Includes 4 crystal-themed whimsies Inspired by the formation of agate, a colorful banded stone - Each has a unique computer generated shape and pattern, and each computer generated image represents a slice of algorithmic agate. The interlocking shapes of the pieces grow using a simulation of elastic rods Each piece is laser-cut without any burrs on the edge - Made in Palenville, New York Material: 1/4" birch plywood Dimensions: 8.00 x 0.25 inches (assembled) Weight: 0.62 pounds Color: multicolor Each item is unique, and the item received would be slightly different from the one shown in the images - There would be slight variations in colors, shapes, and patterns THIS ITEM IS NOT INTENDED FOR USE BY CHILDREN 15 AND UNDER Relax and unwind while completing this 180-piece colorful agate wooden mind exercise challenge. This challenge includes 4 crystal-themed whimsies. The product is colorful and inspired by the formation of agates, a colorful banded stone. Each has a unique computer-generated shape and pattern, and each computer-generated image represents a slice of algorithmic agate. The interlocking shapes of the pieces grow using a simulation of elastic rods. This product is made of premium birch plywood. Each piece is laser-cut without any burrs on the edge. Each item is unique, and the item received would be slightly different from the one shown in the images. There would be slight variations in colors, shapes, and patterns. The product measures 8.00 x 0.25 inches when assembled. Color: Multicolor. Please note that this item is not intended for use by children 15 and under.