The event will run on weekends in October, but be warned: costume masks don't meet Legoland's face mask requirements.
Theme parks can't fully reopen in California, but they're finding ways to welcome back guests without rides or attractions.
Disney has announced that Rivers of Light, Primeval Whirl and Stitch's Great Escape are now permanently closed.
The rule change is due to the city of Winter Haven, Florida passing a face mask ordinance on Monday.
Theme park notes: Busch Gardens Williamsburg capacity battle / Disney glitch / Legoland California delay
Virginia State Sen. Tommy Norment called the capacity restrictions keeping the park closed "myopic and devastating."
The Winter Haven resort declined to specify the number of layoffs or which departments were affected.
Legoland indicated it will continue to provide free face masks to guests, but will not require them to be worn like other Florida theme parks.
Unlike Disney World and Universal Orlando, Legoland Florida is not requiring guests to wear a face mask or covering when it reopens on June 1.