While many families enjoy spring break this week, Southern California’s theme parks are readying new attractions and lodgings for summer vacation.

Legoland California: The 250-room Legoland Castle Hotel opens April 27 at the park in Carlsbad (San Diego County), the first resort-style accommodations in the park. Next to the park’s main entrance, the hotel will offer themed rooms — Knights & Dragons, Royal Princess and Magic Wizard — with Lego building tables and a zero-entry pool with whirlpool spa, entertainment courtyard and cinema. Rates start at $601 for two adults and two children, with two-day park passes and breakfast included.

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Also, in July, Legoland California plans to debut its biggest investment in a ride to date, Lego City: Deep Sea Adventure, a four-minute submarine voyage through a 300,000-gallon aquarium with live stingrays, sharks and other marine life. Eight submarines each will hold 12 passengers who can seek hidden treasure while looking through individual portholes. www.legoland.com/california

Disney California Adventure: Characters from “Toy Story,” “The Incredibles” and “Inside Out,” among other popular films, will have a new home at the park in Anaheim when Pixar Pier opens June 23. Featuring four “neighborhoods” of reimagined rides and attractions, Pixar Pier will also offer a new sit-down restaurant, the Lamplight Lounge, overlooking Paradise Bay. Paint the Night, an illuminated parade starring Pixar characters, debuts April 13. www.disneyland.com

Knott’s Berry Farm: The Buena Park attraction (just west of the Disney complex in Anaheim) will showcase new entertainment this summer. “Snoopy’s Magnificent Magical Revue,” featuring Peanuts characters and magician Greg Wilson, debuts June 10, with performances on select dates through Aug. 20. Its reprise of “Ghost Town Alive!” — a kind of family-friendly version of “Westworld” — will boast new characters, storylines and activities in the simulated Wild West town of Calico, running May 27-Sept. 4. www.knotts.com

Great Wolf Lodge: This indoor waterpark resort in Anaheim started “Wine Down Service” — wine and cheese room service for adults — last summer. This summer it caters to all ages with the Great Wolf Candy store, offering bulk and packaged sweets. www.greatwolf.com/southern-california

— Jeanne Cooper