Come early to Harry Grove Stadium for the Principal Financial Group Family Fun Fest. The FREE event opens 3 hours before game time just outside the ballpark. Don't miss the batting and pitching cages, bungee runs, super slide, the Xbox 360 Best Buy Home Run Derby Video Game Trailer with Rock Band stage, a spectacular Minor League Baseball Museum, and you can even put yourself on a free souvenir Days Inn baseball card or Sports Illustrated Kids Magazine cover. Donate new or gently used baseball equipment to "Pitch in for Baseball" and receive a coupon for XBox 360 software at Best Buy and a special ticket offer from the Keys. To learn more about the Principal Financial Group Family Fun Fest, click here .