Crystal Structure Puzzle Ball Size_40" x 70" | 100 x 180 cm or keep a warm drink

or keep a warm drink at the ready on chilly mornings

your problem sets and mathematical musings are sure to be more beautiful than ever

It features scientific illustrations in olive gray on a background the color of an aged yellow manuscript

these high-opacity gem and mineral-inspired gel pens write boldly on black or white paper

or cold brew at your own pace

Crystal Structure Puzzle Ball Size_40" x 70" | 100 x 180 cm or keep a warm drinkLooking for a new challenge to puzzle over? Check out this crystal structure puzzle ball! This complex wooden puzzle features 12 pieces and a unique shape, it'll even make an advanced puzzle solver scratch their head a few times.