Jan and her best friend Sarah have visions of their home-made volcano erupting wildly in class, lava running down its sides as their classmates stare in awe.
They want to be the only Grade Three kids at the Science Fair, and their teacher Mrs. Nelson says they can go. But in her next breath she says, "just don't try the baking-soda-and-vinegar-volcano." They're devastated, but decide to look for another project anyway. Finding a safe Science Fair exhibit proves harder than they thought, but with the help of a box full of garbage and thousands of worms, they find an explosive solution.
Jan's Big Bang is a story about two extremely resourceful girls and the rewards they gain for persevering.