CERN published an article about developing superconducting karts to transport workers through the Large Hadron Collider tunnel, but it was later revealed to be an April Fool's joke. The article described the karts as being turbo-boosted by 64 superconducting engines and having applications for society. The project was said to have begun as a collaboration between CERN engineers and onsite nursery school children. The article was intended to drum up interest in the Hi-Lumi LHC project.