Tag Archives: Vanishing Line

Vanishing Line

Vanishing Line

Vanishing Line 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 call this the “Sobriety Test”, yet there is an interesting math basis for the puzzle. The idea for this wonderful illusion came 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 it is very strong. Size of the puzzle in base is 7″ x 3.25″ x 0.6″

The American Academy of Pediatrics defines early childhood as the age of one to five and includes the periods of the child and the kindergarten. The development of early childhood takes place quickly and is widely recognized as extremely important in laying the foundation for future learning, including the social, cognitive, and motor skills needed to meet the demands of kindergarten and kindergarten. During these years of formation, parents and others who care for their lives have the ability to improve their development by wisely choosing activities that stimulate and challenge their minds.

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