This time, it's Lulu's birthday and all of her little bug friends have come over for her outdoor party. Despite a big rain storm that threatens to ruin the fun, Lulu helps all of her friends have a great time. The story shows how, with a little bit of humor and creativity, it's often possible to turn what looks like something unpleasant into something fun. In the story, Lulu really does turn "lemons into lemonade.".