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  > Show All 1-21 of 140 matching items. For More Results - Page: 1 2 3 4 5 6 7    Sort: Bestselling!NewestAlphabetical (A-Z)Alphabetical (Z-A)Price (Low to High)Price (High to Low) Include Out-Of-Stocks Money Maze - Money Puzzle $10.95 Gift Card Money Maze - Money Puzzle $5.95 Bilz Mini - Money Puzzle $8.95 Seriously Secret Treasure Box - Money Puzzle $7.49 Bilz Mini (Blue) - Money Puzzle $8.95 Bilz Box (Blue) - Money Puzzle $10.95 Seriously Secret Treasure Box: ADVANCED, Classic Wood - Money Puzzle $8.95 Bilz Mini (Green) - Money Puzzle $8.95 Lunatic Lock - Puzzle Lock $8.95 Free the Key: Mini Edition - Brain Teaser $8.95 Seriously Secret Treasure Box: Classic Wood - Money Puzzle $6.95 Nails - Metal Pocket Puzzle $4.95 Pyraminx (White) - Puzzle Cube $9.95 Get Charged - Brain Teaser $9.95 Bubukao - Puzzle Cube $9.95 Mirror Cube - Puzzle Cube $9.95 Devil's Hook - Amazing Classic Brain Teaser $4.95 Pack It In - Classic Brain Teaser $4.95 Human Baffle Puzzle - Wood Disentanglement Puzzle $8.95 Fifteen Puzzle - Classic Slider Puzzle $9.95 Pharaoh - Puzzle Cube $6.95 For More Results - Page: 1 2 3 4 5 6 7 140 matching items Narrow down: By Type: Accessories (2) Brain Teasers (3) Brain Teasers | Advanced (10) Brain Teasers | Assembly Puzzles | Advanced (1) Brain Teasers | Assembly Puzzles | Burr Puzzles (1) Brain Teasers | Assembly Puzzles | Interlocking (14) Brain Teasers | Assembly Puzzles | Intermediate (1)   See More Types... Brain Teasers | Assembly Puzzles | Models (10) Brain Teasers | Assembly Puzzles | Stackable (6) Brain Teasers | Assembly Puzzles | Tessellations (7) Brain Teasers | Beginner (5) Brain Teasers | Classics (13) Brain Teasers | Disentanglement (1) Brain Teasers | Disentanglement | More... (13)   See The Rest... Brain Teasers | Disentanglement | Parlor Puzzles (4) Brain Teasers | Disentanglement | Tavern Puzzles | Accessories (2) Brain Teasers | Disentanglement | Tavern Puzzles | Show All (1) Brain Teasers | Disentanglement | Wood Puzzles (7) Brain Teasers | Disentanglement | Wood Puzzles | Beginner (1) Brain Teasers | Disentanglement | Wood Puzzles | Intermediate (2) Brain Teasers | Disentanglement | Wood Puzzles | Show All (6) Brain Teasers | Entrapment Puzzles (11) Brain Teasers | Intermediate (4) Brain Teasers | Key Chains (2) Brain Teasers | Mazes (3) Brain Teasers | Money Puzzles (9) Brain Teasers | More... (7) Brain Teasers | Pattern Matching (8) Brain Teasers | Peg Puzzles (11) Brain Teasers | Pocket Sized Puzzles (6) Brain Teasers | Puzzle Cubes (21) Brain Teasers | Puzzle Cubes | Minx Cubes (1) Brain Teasers | Puzzle Cubes | Special Shapes (11) Brain Teasers | Puzzle Cubes | Speed Cubes (4) Brain Teasers | Puzzle Locks (1) Brain Teasers | Puzzle Rings | Accessories (1) Brain Teasers | Rubik's (2) Brain Teasers | Sequential Puzzles (3) Brain Teasers | Show All (2) Brain Teasers | Sliding Puzzles (2) Brain Teasers | Tangle (4) Brain Teasers | Travel Puzzles (7) Brain Teasers | Volumetric Puzzles (10) Cool Stuff (2) Games | More... (1) Games | Party (1) Great Gifts (7) Jigsaw Puzzles | By Theme | Animals | Butterflies & Insects (1) Jigsaw Puzzles | By Type | Double-Sided (1) By Difficulty:     Beginner (28)     Intermediate (76)     Advanced (25)     Extreme (3) By Ages:     3 yrs & up (1)     4 yrs & up (1)     5 yrs & up (8)     6 yrs & up (17)     7 yrs & up (2)     8 yrs & up (29)     10 yrs & up (5)     12 yrs & up (1)     14 yrs & up (2) By Price: $10 & under X 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.