Bits and Pieces - EZ Atom Metal Puzzle - Marble in The Center Puzzle - Brainteaser Puzzle - Measures 3-1/4" x 3-1/4" x 3-1/4" Try to remove the marble from the center and return it to its original form! Challenging fun. Metal Brainteaser. Great gift. Measures 3-1/4" x 3-1/4" x 3-1/4".