S2E4: Lamb in a Jam

Lambie got covered with jam while being placed into Doc's backpack due to a faulty sandwich bag. Before going with her to school on "Take Your Toy To School Day", Lambie felt sad and bitter about not going to school with Doc. So, she covered Stuffy who was to take her place for "Take Your Toy To School Day" in jam as well preventing him from going to school with Doc.