Remember that Animaniacs song that names every single U.S. president? The wacky cartoon's history lesson is still clever, for both kids and adults, kind of like this American Presidents iPad app. What does it do? Gives you bios of all 44 U.S. presidents with beautiful illustrations to match. Why do we like it? It's not just presidential history—U.S. Presidents also discusses landmark Supreme Court cases, talks about crucial legislation, and deals with key events like the Civil War and the American Revolution. And seriously, you are never too old to brush up on your history. Read the full story a t Gizmodo.