Decorating a Truck For a T-ball parade?

My son is starting his first t-ball season. To kick off the season, they will be holding a parade. We have to decorate a truck for the kids to ride in. I am looking for some decorating ideas for the truck. They are the White Soxs and the team colors are Black and White. I am known for my elaborate birthday party decorations but, am drawing a blank on how to creatively decorate the truck to win!