It was an exciting day for students at Greenfield Elementary School in Pittsburgh on Thursday. Pittsburgh Steelers running back Najee Harris visited the students. Harris teamed up with Tony the Tiger to surprise the students at a pep rally and give a big donation. Kellogg's Frosted Flakes program called Mission Tiger is meant to help give more Pittsburgh students the opportunity to play sports. "I'm excited to announce that I'm here with my man Tony and Frosted Flakes. We have new jerseys and new equipment so every one of you can play like tigers," Harris said. The NFL running back couldn't just show up for a visit and not have any fun. Harris and Tony the Tiger ran some drills with Greenfield's co-ed flag football team.