2x17 - Charlie and Lola

When Lola loses her favorite stuffed toy, Foxy, she begins to worry that she will get lost too. She decides she's not going on the surprise school trip and manages to convince Lotta not to either. Charlie and Marv help the two out by telling them many different ways to get lost. Lola and Lotta begin to realize that if they're prepared, they don't have to worry about being lost.