Oxford Read and Imagine Level 6: What's So Funny?

Oxford Read and Imagine graded readers are at eight levels (Starter, Beginner, and Levels 1 to 6) for students from age 4 and older. They offer great stories to read and enjoy. Activities provide Cambridge Young Learner Exams preparation.
At Levels 1 to 6, every storybook reader links to an Oxford Read and Discover non-fiction reader.

A mysterious gas is escaping from a hole in the Happy World tanker. Soon, everyone is laughing, but they don't know why. What will happen when the laughter stops? Can Grandpa find a cure for the laughing illness before it's too late?

Audio in a choice of American and British English is available for every reader.
At Levels 1 to 6, audio is available in MP3 downloads packs for every reader.