Kids at the Children's Hospital of Philadelphia got quite the surprise when they looked out their windows earlier this week.

They were greeted by a friendly group of Mighty Morphing Power Rangers.

The hospital says the window washers are employees of Jenkintown Building Services, and that this isn't the first time they've dressed up for the children.

GRANDPA, MOM AND BABY BATTLE LIFE-THREATENING ILLNESSES TOGETHER

Sesame Street, Ninja Turtles, Spider-Man, and several other characters have all graced the windows of the hospital in recent years.

On this particular day, the washers started at the 8th floor, out of the south tower bridge, and made their way down. On the way, they stopped at each floor, waving to patients and high-fiving them through the glass.

This article first appeared on Fox 29.