How do you get a magic broom arena on Sims?

To get a magic broom arena in The Sims, you'll need to have the "Realm of Magic" expansion pack. Once you have it, you can purchase a magic broom from the computer or the magic shop in Glimmerbrook. After that, you can build a broom arena by creating a designated space in your lot, using the build mode to add the necessary items like a broom racing track or other magical decor. Lastly, invite other Sims to join in for broom racing and competitions.