This is a two-dimensional puzzle called the T-puzzle. This puzzle is not easy. You might want to give up, but you will get a sense of accomplishment when you finish. The goal is to use four puzzle pieces to make one larger shape. There are 100 possible shapes. [Instructions]1. When you click a shape, the shape rotates by 45 degrees.2. When you click and hold a piece, the piece flips vertically.3. To move a piece, you click and drag it.4. Without overlapping the four pieces, you must create a given shape. There are lots of potential shapes you can make.Google+ : https://plus.google.com/u/0/b/110254030375614704296/110254030375614704296/posts