The most adorable scene in Glee history, so far, debuted in the same episode as Gwyneth Paltrow.

In Tuesday’s “The Substitute,” Will Schuester (Matthew Morrison) gets sick, but attempts to muscle through anyway. When he hallucinates that all the New Directions kids have turned into toddlers, he knows it’s time to go home to bed … and we got to see the cutest show moment ever.

Watch the video above to get a behind-the-scenes look at the adorable child actors who help steal the show on Tuesday night. Heather Morris, who plays Brittany S. Pierce, gives fans an in-depth look at making TV magic … with mini-mes.