Challenging to Complete, Beautiful to Display: This puzzle is designed for ages 12 and up. An innovative new spin on the age-old flat jigsaw puzzle category: this puzzle contains 3-dimensional interlocking pieces Collect them all: More than 150 unique designs and colors available, with new puzzles released every year Brainteaser Meets Puzzle: Original 3D Crystal Puzzles are among the most challenging, perplexing and fun puzzles you will build 3 Dimensional: Puzzles contain interlocking, colorful, 3-dimensional puzzle pieces with step-by-step puzzle solutions available for extra help Build and Display: Show off your accomplishments and display your completed 3D puzzles for family and friends on your coffee table or use as a shelf or home décor Great for All Puzzlers: If you love jigsaw puzzles, you will love Original 3D Crystal puzzles, perfect brain teasing puzzle for teens, tweens and adults Great Gift: The elegant compact design of Original 3D Crystal Puzzles makes for a great gift for puzzle lovers Quality Puzzle Construction: Each puzzle features precision-molded, clear hard plastic pieces for flawless puzzle construction Mental Agility: Perfect for enhancing problem-solving, critical thinking, and strategic thinking skills