I'm lucky enough to work with a philanthropy that benefits the hospital and I know these kids and their families were absolutely over the moon to have him visit. Considering he's here filming another project and probably had a million other things he could be doing, it's really great of him to spend his Saturday at the hospital.
ETA: if Chris Pratt's heart of gold inspired you, this is Our Lady of the Lake in Baton Rouge. I am but a humble college student that helps raise funds for this hospital as part of Children's Miracle Network. If you have a CMN hospital in your area, I guarantee they could use your dollars. Almost all of CMN's corporate stuff is underwritten by sponsors, so over 90¢ of every dollar goes directly to the actual hospitals.