Rylynn Darst, 2, and her sister, Evelynn, 3, are enjoying a new playset in their backyard in West Jefferson, thanks to Roc Solid Foundation, a non-profit organization that provides playsets to children who are fighting cancer. Rylynn and Evelynn are the daughters of Matt and Marcy Darst. Rylynn is battling craniopharyngioma, a rare type of brain tumor.