The Package Problem - Peg's Neighborhood. When Peg and Cat are waiting for a package, one minute feels like forever; but when they're trying to prevent an explosion, time flies! Primary Content: Minutes and seconds Secondary Content: Adding to 7. The Train Problem - The Peg + Cat Express. Missing lollipops, bananas, symphonies, and chickens can only mean: there's a thief on the Peg + Cat Express! Primary Content: Subtraction Secondary Content: Above and below.