Pop-Up Express / Pop Up Snowman

S1 E6: When Zack wants to cool down on the hottest day of summer, he decides to take a train trip to the snow - but along the way, he discovers that he’s not the only one who needs cooling down./When Zack and Quack’s beloved snowman starts to melt with the onset of Spring, the friends head off on a journey to get him to the cold before it’s too late.