These window washers turned 'Power Rangers' paid a surprise visit to patients at The Children's Hospital of Philadelphia on Tuesday.

CHOP shared this sweet photo from Tuesday of a patient flexing as the Power Rangers made their way down the west Philadelphia building:

According to USA Today, Jenkintown Building Services do this every year to entertain CHOP patients, as a way to take "the kids out of the moment and takes them to a higher moment."

In previous years, they've dressed as Ninja Turtles, Captain America and Spiderman -so sweet! The children held signs and waved from the window as the 'superheroes' descended 8 stories.

Love reading stories about people who go out of their way to make others smile! Read the full story on USA Today or on Philly Voice.

Watch the coverage from 6abc News here: