Thinker Original 3D Crystal Puzzle from BePuzzled, Ages 12 and Up

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 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 Puzzles contain interlocking, colorful, 3-dimensional puzzle pieces with step-by-step puzzle solutions available for extra help