MINNEAPOLIS (WCCO) — They are faster than a speeding bullet and more powerful than a locomotive!

But these superheroes are not leaping tall buildings. They are climbing the walls to clean the windows at Children’s Hospitals and Clinics of Minnesota in Minneapolis.

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Batman and Superman, with the help of Spiderman and Miss Incredible, go to work once a year. It is one way to visit sick kids inside the hospital.

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“It’s great. They love to see the super heroes pop in front of the windows when they’re not expecting it, and it’s a simple thing that makes everyone smile,” Acme Window Cleaning’s Jeremy Suelter said.

Acme Window Cleaning Company has had a contract with Children’s Hospitals in Minneapolis and St. Paul for years.

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(credit: CBS)

(credit: CBS)