This is one of those rare times when doing something fun can help stop something terrible. As part of the Kentucky Derby Festival (which means free admission with your Pegasus Pin) there will be a massive white canvas on the Great Lawn with that ugly combination of six letters: c-a-n-c-e-r. And for $5 you can throw a paint-filled balloon to splat out cancer with a rainbow of colors. Every dollar you spend benefits cancer research at the James Graham Brown Cancer Center.