Puzzling Times: Double Squared, a.k.a. Black or White
Double Soma Cube - Wooden Puzzle - Solve It! Think Out of the Box
Buy Lodes Puzzle Double Square Matted white | dmlights.com
Buy Toysbox Tangram Puzzle 7 Pieces and 786 Patterns Educational Jigsaw Puzzle Game of Shapes for Mind Development of Kids Online at Low Prices in India - Amazon.in
Double Square Puzzle - make a 4 pc then a 5 pc square
Double Square (a.k.a Square Me, Five Block Puzzle, Madagascar Madness)" - Copyright J. A. Storer