Einstein's Underpants and How They Saved the World

It's a bad news day for planet Earth. Not only is it about to be invaded by aliens, it's also about to be struck by a giant asteroid which will wipe out all humans. The only people who can help are a group of geeky kids, who believe they have superpowers, and crazy Uncle Otto who believes that a pair of Einstein's old underpants will save the world. Suggested level: primary, inermediate.