My Cart | Sign In Contact | Returns | Shipping | Privacy   Questions? Live Chat Or, call: 1-856-461-8883 Home | My Cart Search All Items:  You have 0 item(s) in your cart worth $0.00  Jigsaw Puzzles $Money Puzzles Brain Teasers   - Assembly   - Classics   - Disentanglements   - Don't Puzzles   - Entrapment Puzzles   - Key Chains   - Mazes   - Money Puzzles   - Pattern Matching   - Peg Puzzles   - Pocket Sized   - Puzzle Boxes   - Puzzle Cubes   - Puzzle Locks   - Rings   - Rubiks   - Sequential   - Sliding   - Sudoku   - Tangle   - Travel   - Volumetric   - More...   Other:   - Books   - Cool Stuff   - Games   - Hoberman   - Puzzle Boxes   - Puzzle Cubes   - Puzzle Rings   - Rubik's Cubes   More:   - Eco-Friendly   - Made in USA   - New Items   - Sale Items   - Top Sellers     - Accessories   - Gift Sets   - Great Gifts   - Solutions     Volume Orders & Corporate Sales   Institutional Sales What sets us apart from others? Free Standard Shipping* on all orders $60.00 or more! read more Same Day Shipping on orders placed before 4pm EST, M-F! read more Customer Service in just a moment's notice, 9am to 6pm EST M-F! Email, Phone, or Live Chat, read more Brain Teasers > Advanced > Assembly > Beginner > Classics > Disentanglements > Don't Puzzles > Entrapment > Extreme > Intermediate > Keychains > Mazes > Money Puzzles > More... > Pattern Matching > Peg Puzzles > Pocket Sized > Puzzle Boxes > Puzzle Cubes > Puzzle Locks > Rings > Rubik's > Sequential > Show All > Sliding > Sudoku > Tangle > Travel > Volumetric  > More... These unique brain teasers defy classification. You'll find truly distinctive puzzles here! 1-21 of 38 matching items. For More Results - Page: 1 2    Sort: Bestselling!NewestAlphabetical (A-Z)Alphabetical (Z-A)Price (Low to High)Price (High to Low) Include Out-Of-Stocks Square - Cast Puzzle $11.95 Quadruple 2x2 Cube - Puzzle Cube $14.95 Snap Latch - Secret Puzzle Box $13.95 Davinci's Secret (1 of 7) - Brain Teaser $33.60 Icosoku - Brain Teaser $18.95 Iball3 - Brain Teaser & Game $24.65 Internal Combustion - Brain Teaser $15.95 The Equation (2 of 7) - Brain Teaser $28.95 Escher $18.95 Iso Crate - Brain Teaser $22.95 Adam's Cube - Brain Teaser $9.95 ISIS Metal Brain Teaser w\ Leather Box - EXCLUSIVE Gold & Blue Version! $209.95 Brainstring Advanced - Brain Teaser $16.95 Rattler - Wooden Brain Teaser $9.95 36 Cube - Brain Teaser $24.95 Davinci's Secret: Legend of the King (3 of 7) - Brain Teaser $33.60 Copernisis NKryptor - Metal Brain Teaser $69.95 Copper Sentinel - Metal Brain Teaser $69.95 Four Piece "Jigsaw" - Brain Teaser $8.95 Puzzle Tower, Intermediate - Wooden Brain Teaser $13.95 X Marks the Spot - Brain Teaser $9.95 For More Results - Page: 1 2 38 matching items Narrow down: By Type: Brain Teasers | Assembly Puzzles | Interlocking (1) Brain Teasers | Assembly Puzzles | Stackable (2) Brain Teasers | Beginner (1) Brain Teasers | Disentanglement | Cast Puzzles (1) Brain Teasers | Entrapment Puzzles (1) Brain Teasers | Extreme (1) Brain Teasers | Intermediate (1)   See More Types... Brain Teasers | Money Puzzles (1) Brain Teasers | More... (38) Brain Teasers | Pocket Sized Puzzles (1) Brain Teasers | Puzzle Boxes (1) Brain Teasers | Puzzle Cubes (1) Brain Teasers | Sequential Puzzles (3) Brain Teasers | Show All (1)   See The Rest... Brain Teasers | Tangle (1) Brain Teasers | Volumetric Puzzles (1) Cool Stuff (1) Games | More... (10) Games | Strategy (1) Great Gift Ideas Under $25.00 (1) Great Gifts (2) By Difficulty:     Beginner (3)     Intermediate (11)     Advanced (17)     Extreme (4) By Ages:     6 yrs & up (3)     7 yrs & up (3)     8 yrs & up (8)     10 yrs & up (2) By Price:     $10 & under (7)     $11 to $15 (8)     $16 to $20 (3)     $21 to $25 (4)     $26 to $30 (3)     $31 to $40 (3)     $51 to $75 (2)     over $100 (8) Get SERIOUS... SeriousChai.com   - Chai Tea, Big Train, Ghirardelli SeriousFlags.com   - Garden Flags, Toland Flags, Decorative Flags SeriousCards.com   - Playing Cards, Chess, & Games SeriousPlush.com   - Plush Toys, Stuffed Animals SeriousPuzzles.com   - Jigsaw Puzzles, Brain Teasers, Money Puzzles   Headquarters: SeriousShops.com 1812 Underwood Blvd. STE 4 Delran, NJ 08075 US United States Copyright © 2001 - , all rights reserved SeriousPuzzles.com®, an AJM & Co., Inc. company SeriousShops.com, a network of online stores. Customer Service Contact Us Live Chat Returns Shipping Guarantee Bulk Orders & B2B Volume Orders Corporate Sales Institutional Sales Policy Stuff Privacy Policy Conditions of Use More Missing pieces? Solutions A really big puzzle! Account My Cart My Account My Orders Sign In Register About Us Why & How Who's Serious? Recognition Read our blog! SeriousShops.com Site Map Experience Tell us what you think Report a problem

Interlocking: This means that adjacent pieces are connecting such that if you move one piece horizontally you move all, preserving the connection.