This simple puzzle is one of my favorites. It's has 3 pieces (2 are the same) and takes some fun sliding and turning movements to assemble and take apart.
The exact pieces you use will depend on your collection, it's more about building the right shapes. Each of the 3 pieces you build will consist of three layers, plates, bricks, and tiles, in that order from bottom up. That being said, you will need a variety of plates, bricks, and tiles to make this puzzle.