CubicFun LED 3D Puzzle 136 Pieces: Burj Khalifa A fun and challenging 3D puzzle of The Burj Khalifa Constructed using CubicFun's unique slotting system, Puzzle: Similar building toy like Lego, Difficulty Level: 7, Number of Pieces: 136, Age: 12 Years And Up Construction Time: over 4 hours Great holiday gift for young and old, Develop logical thinking, Best for schools, Day cares and Educational institutions, fun and attractive, beautiful souvenir.