Mini Matisse: Optical Illusion Line Design
  Mrs. E Teaches Math: June 2015
 January 2012 ~ Artful Artsy Amy
 Mrs. E Teaches Math: June 2015 
  
  
 
 Mrs. E Teaches Math: June 2015 
 photo trick: cool optical illusions for kids 
 
  
 Inexplicata The Journal of Hispanic Ufology: November 2013 
  
  
 
 photo trick 
 
  
 Dark Roasted Blend: Optical Illusions Extravaganzafunnyjunk optical illusions