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Creative Crafthouse

Vanishing Line

Vanishing Line

$15.00 USD
$15.00 USD
Sale Sold out
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Look at the 2 pieces of wood and you will clearly see 13 horizontal lines. Yet flip the frame upside down and there are only 12 lines! How can this be?

Some may call this the "Sobriety Test", yet there is an interesting math basis for the puzzle which is explained in the video.

It is a wonderful illusion that I got the idea to make from one of Martin Gardner's recreational math books. Good for messing with friends, or a coffee table/bar type item, or effective in the math classroom also.

Pieces are made from 1/4" thick hardwood, either maple or cherry. Base is made from floorboard material so is very strong. Size of puzzle in base is 7" x 3.25" x .6"

Level of Difficulty: Level 2
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FAQ

Where are your products made?

Our puzzles and games are handcrafted with care. Most are made in the USA by the Janelle family; some are crafted by friends in Canada, Japan and Mexico and some right here in Albuquerque. Be sure to ask for recommendations.

What's the story behind Puzzled?

Puzzled® was born from a passion for play and the joy of bringing people together through the art of puzzling. Founded by Dan Janelle and Melanie Kintigh in Old Town Albuquerque, our store is a celebration of creativity, curiosity, and community. Drawing from a rich history of craftsmanship and a love for brain teasers, we offer an eclectic mix of handcrafted puzzles and games designed to challenge and delight minds of all ages. At Puzzled®, every piece tells a story, and every visit is an adventure waiting to unfold.

What is your shipping and returns policy?

We offer free shipping on US orders over $200, typically dispatching within 2 business days, often sooner. For items not immediately available, we'll reach out to discuss your options. Our shipments within the U.S. are primarily through USPS Priority Mail, with UPS for larger packages, aiming for a 2-4 day delivery.

For international shipping inquiries, please contact us directly. We strive for transparency in shipping costs, keeping them close to actual with a minimal handling fee.

Your satisfaction is paramount. If you’re not happy with your purchase, items in their original condition can be returned within 14 days for a refund or exchange. Contact us for return authorization and instructions.