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   Show All     Assembly     Classics     Disentanglements     Don't Puzzles     Hoberman     Keychains     Mazes     Money Puzzles     Pattern Matching     Peg Puzzles     Pocket Sized     Puzzle Boxes     Puzzle Locks     Rings     Rubik's     Puzzle Cubes     Sequential     Sliding     Sudoku     Tangle     Travel     Volumetric     More...     Beginner     Intermediate     Advanced     Extreme   ...an enigma; puzzling, ambiguous, or inexplicable. Our brain teaser category spans many types of puzzles, made of various materials, with all kinds of solutions. Brain teasers are puzzles that require a different kind of thinking, also known as lateral thinking. The solutions are elusive and probably not straight-forward. Browse our Brain Teaser sub-categories by clicking through the navigation menu to the left. 1-21 of 29 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 Gordian's Knot - Interlocking Puzzle $9.95 Atom Bomb - Interlocking Puzzle $10.95 Adam's Apple - Interlocking Puzzle $10.95 Scrambled Egg - Interlocking Puzzle $10.95 Lucky Clover - Interlocking Puzzle $15.95 24 Piece Puzzle - Interlocking Puzzle $15.95 Star - Interlocking Puzzle $10.95 Family Jewel - Interlocking Puzzle $11.95 Deja Vu - Interlocking Puzzle $10.95 Zig Zag Knot - Brain Teaser $10.95 Wild Dog - Interlocking Puzzle $11.95 Polyminoes - "Dice Box" Volumetric Puzzle $9.95 Four Piece "Jigsaw" - Brain Teaser $8.95 Galaxy Challenge - Interlocking Puzzle $22.95 Gyro - Interlocking Puzzle $10.95 Triple Cross - Interlocking Puzzle $11.95 Astrologic - Interlocking Puzzle $8.95 Star of David - Assembly Puzzle $11.95 Timber Box - Interlocking Puzzle $19.20 Curious Cross - Interlocking Puzzle $8.95 Star Burst - Brain Teaser $8.95 For More Results - Page: 1 2 29 matching items Narrow down: By Type: Brain Teasers | Assembly Puzzles | Interlocking X Goto this section. By Difficulty:     Beginner (2)     Intermediate (11)     Advanced (14)     Extreme (1) By Ages:     3 yrs & up (1)     6 yrs & up (2)     8 yrs & up (4)     14 yrs & up (1) By Price:     $10 & under (14)     $11 to $15 (8)     $16 to $20 (4)     $21 to $25 (1)     $26 to $30 (1)     $41 to $50 (1) 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.