This is a puzzle I set about designing years ago. It started as a simple 3x3x3 assembly cube that had to fit inside the box. The pieces were randomly chosen and then worked with until I ran into a solution. After reflecting upon the puzzle a year later, I realized that I wanted it to be more unique (hence the name Uni-Cube), and I came up with some restrictions that I would have to follow to redesign the puzzle. The restrictions are as follows: <p> -Three of the puzzle pieces must contain 4 "cubes" <p> -Three of the puzzle pieces must contain 5 "cubes" <p> -All puzzle pieces must not have 2x2 blocks contained in them <p> -All puzzle pieces must be 2-dimensional (that is with a maximum height of 1 cube in a single dimension). <p> -These restrictions led to the creation of the Uni-Cube Black. The Black puzzle has 2 solutions, both only slight variations of each other (and an additional 2-dimensional solution as well). I designed this puzzle after reading a chapter from the book "The Puzzling World of Polyhedral Dissections". The original design was made by making a 3x3x3 cube out of 27 dice, and then taking pieces out and gluing them together to get the unique pieces. If you decide to make this puzzle for yourself, please give me credit. Thanks!