One of the hardest interlocking brain teaser burr puzzles in our collection. The puzzle has 4 burr pieces locked inside the drawer frame, all the burr pieces are rods with notches, which make the puzzle extremely difficult to solve because of the "holes" created in the interior of the puzzle.

The Great Meteor puzzle is based on an original design called "Japanese crystal" first created in Japan around the 19th century. This beautiful and intriguing puzzle is one of the most challenging puzzle in our interlocking puzzles collection. It's perfectly symmetrical multifaceted celestial structure is made out of 51 non-identical interlocking bar pieces. Each piece precisely cut so that the pieces can interlock perfectly to make a solid structure.

Challenge yourself with this celestial star shape puzzle! This beautiful and intriguing puzzle is made out of 24 non-identical interlocking wooden pieces. Each piece precisely cut so that the pieces can interlock perfectly to make a solid structure.

The mission impossible puzzle is one of the hardest packing puzzles we have in our collection. This packing puzzle takes it to another level with 25 identical Y-shaped pieces that you need to pack into a 5x5x5 cube using all the pieces.

The BrainStorm puzzle is an interesting variation on the classic Soma Cube. The BrainStorm is made up of 12 pieces, the objective is to fit the pieces together into a 5x5x5 cube. Unlike many puzzles, there is more than one solution to this entertaining puzzle.

The Trap will requires you to exercise patience and caution as you try to free the trapped ball in 11 moves! This puzzle will push you to think carefully about every twist and loop of the string - take a wrong move and you could end up with a tangled nest!

The 4x4x4 Anaconda cube is a monster challenge. The Anaconda takes our popular Snake Cube to a higher level with 64 cubelets that you need to twist into a 4x4x4 cube.

This put together puzzle takes packing puzzles to another level, with 25 identical Y-shaped pieces that you need to pack into a 5x5x5 cube using all the pieces. Unlike many puzzles, there is more than one solution to this entertaining puzzle but only one solution to create the cube with alternating colors arrangement - which makes it the ultimate challenge!

The Super Burr mechanical puzzle is one of the hardest interlocking burr puzzles in our collection and out there in the puzzle world. The puzzle's design makes it almost impassable to solve, because of the "holes" in the interior of the puzzle body, unlike most other regular Burr puzzles, that have a solid body with no holes in the interior.

The Dinosaur Egg mechanical puzzle is made of 12 non-identical wooden pieces that form a challenge both in releasing the puzzle and putting it back together. This puzzle contains precision-cut pieces that fit together to form a smooth and compact Dinosaur Egg shape.

This beautiful and intriguing mechanical Ladder puzzle is one of the most challenging puzzles in our interlocking puzzles collection. This perfectly symmetrical multifaceted celestial structure is made out of 51 non-identical interlocking bar pieces.