You can create an in-home course with a start line, finish line, barriers, and pennants for the Mario Kart Live: Home Circuit game for the Nintendo Switch system.
Mario Kart Live: Home Circuit – Official Site
Mario Kart Live Home Circuit hands-on: I've turned my house into a racecourse - CNET
Review: 'Mario Kart Live' uses toys to bring series to life
Mario Kart Live: Home Circuit gets unofficial remote play on Surrogate.tv
Mario Kart Live: Home Circuit - Luigi (Nintendo Switch) : Video Games
I don't think this is how Nintendo meant Mario Kart Live to be played
Nintendo Minute Tries Out Mario Kart Live: Home Circuit – NintendoSoup
Best Buy: Mario Kart Live: Home Circuit Mario Set Mario Edition Nintendo Switch, Nintendo Switch Lite HACRRMAAA
Racing around the living room - Play Nintendo
Mario Kart Live Circuit Awesome Accesories
Mario Kart Live': Its augmented reality tops 'Pokémon Go' - Los Angeles Times
KoopaTV: How Mario Kart Live: Home Circuit works, and the SPYWARE threat!