Volunteer, and Penn Memory Center patient Leslie Wolff entertains Hasan Sturgis, 1 year old, with his puppets Tuesday, September 05, 2017 at CHOP Care Network in Philadelphia, Pennsylvania. The Penn Memory Center, which serves people with dementia mild cognitive disorder, has a new volunteer partnership with CHOP. Its patients and “normal controls” volunteer with CHOP patients. (WILLIAM THOMAS CAIN / For The Philadelphia Inquirer)