Material & Size : Made of hardwood, 2.75 x 2.75 x 2.75 inch cube with 54 individual "T" pieces. Wooden Teasers shaped pieces are precision cut, durable and closely fitted. Very smooth, sturdy and high quality, no worry about hurting your hands. Exercise your brain and skills: Our mind puzzle help to exercise brain, develop intelligence, improve problem-solving ability . It is a great brain teaser toy for puzzle lover. you can reassemble the blocks use 2 of different methods: Tile or Tilt the cube box. Difficulty Rated: ★★★★☆ Fun & Challenging: This educational toy provides brain stimulation but also full of challenge and fun. Allows you to relieve stress, relax your mood, and enjoy the time. Wide Application: This 3D puzzle great for both kids and adults. Fit for anyone who have interest with puzzle. It is also the best gift choice, wonderful Christmas gift or birthday present for kids, friends, family or the aged people.