Matt has so many moods. He's over the moon one minute, and green with envy the next. What other emotions does Matt experience? To see, read this hilarious book that teaches 12 idioms about feelings. It will have you in stitches! Series Information Idiom Tales are super-funny stories designed to introduce kids to dozens of must-know idioms. What are idioms? Idioms are colorful expressions that mean something different from what the actual words say, such as dog-tired or in a pickle. Why is it important for everyone to learn idioms? Because these common sayings help kids "crack the code" of the English language and become better readers, writers, and communicators.