Elementary School Flashback

I always loved the first and last days of elementary school. The lesson plans were gone and instead there always seemed to be just tons of brain teasers. So, when Yahoo had a collection of all of these brain teasers I was pretty excited. I was also happy to see that most of them are optical illusions because those are the easiest even if it's a household object like kitchen faucets or vases. (Except for magic eye puzzles I’ve never been able to do that). I think the pixelized portraits are the easiest. There’s also several showing the same image with the same color but with different backgrounds and the contrast totally makes it look like a different color.