It all sounds so simple! Four high-quality cubes sit on a mirror base. All you have to do is position them to create the top half of the solution so that the bottom half appears in the mirror.. However, the four cubes have 24 sides between them & only twelve can remain visible, but which ones? There are three variations to choose from:: Eleven-a-side! Every visible side needs to show an equation that adds up to exactly eleven! Arrows Everywhere! Arrange the cubes so that each side shows a completed arrow! Frustration Dice! Each side needs to look like the face on a die! Or buy a set of all three! An absolutely ingenious idea for ages 8 to adult (our recommendation). Â This is brand new product for us & the sale price discount is based on the manufacturer's recommended retail price.