The gooey, sticky and often-homemade plaything slime was enshrined into the National Toy Hall of Fame on Thursday along with perennial bestselling games Battleship and Trivial Pursuit. The Hall of Fame in Rochester, New York, honors toys that inspire creative play across generations. Battleship and Trivial Pursuit have each sold over 100 million copies. Slime has been sold commercially since 1976 but is also a popular DIY project. The National Toy Hall of Fame is located inside The Strong National Museum of Play.