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  > Classics These brain teasers have been time-tested for decades. They are well recognized by puzzlers around the world, and therefore they are distinguished as such. 1-17 of 17 matching items. For More Results - Page: 1    Sort: Bestselling!NewestAlphabetical (A-Z)Alphabetical (Z-A)Price (Low to High)Price (High to Low) Include Out-Of-Stocks Rubik's 3 x 3 Cube $11.95 Old Shackles (Group 1) - Tavern Puzzle $18.95 Nails - Metal Pocket Puzzle $4.95 2pc Pyramid - Classic Brain Teaser 2 pieces $5.95 Rock The Boat - Brain Teaser $5.95 Soma Cube Premium - Wooden Assembly Puzzle $13.95 Devil's Hook - Amazing Classic Brain Teaser $4.95 Pack It In - Classic Brain Teaser $4.95 Fifteen Puzzle - Classic Slider Puzzle $9.95 IQ Tester, Original - Peg Puzzle $8.95 Adam's Apple - Interlocking Puzzle $10.95 Scrambled Egg - Interlocking Puzzle $10.95 Rectangle IQ - Peg Puzzle $7.95 Family Jewel - Interlocking Puzzle $11.95 Strategy - Sequential Puzzle $5.95 Astrologic - Interlocking Puzzle $8.95 Instant Insanity - Brain Teaser $6.95 For More Results - Page: 1 17 matching items Narrow down: By Type: Brain Teasers | Classics X Goto this section. By Difficulty:     Beginner (2)     Intermediate (12)     Advanced (3) By Ages:     5 yrs & up (3)     6 yrs & up (2)     7 yrs & up (2)     8 yrs & up (2)     10 yrs & up (1) By Price:     $10 & under (13)     $11 to $15 (3)     $16 to $20 (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.