Cause: The Children Affected by AIDS Foundation, founded by Mattel executive Joe Cristina in 1993.
Event: The 12th annual Dream Halloween fund-raiser and children’s costume party at the Barker Hangar in the Santa Monica Air Center, Saturday, 5-9 p.m. Games, toys and cartoon characters abound.
Celebs: Jamie Lee Curtis hosts. Hilary Duff is honorary event chair; Doris Roberts is vice chair.
Goal: Educational, recreational and other support to children affected by HIV/AIDS.
Tickets: $250 for children; $300 for adults. Call Lauran Huff at (310) 201-5033. For info, go to CAAF4kids.org.
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Cause: Restoration of the Greystone Mansion, originally home of the Doheny family; now a historic landmark.
Event: Cocktail reception and silent auction Saturday, 3-6 p.m. Includes a preview of the fourth annual Beverly Hills Garden & Design Showcase, which runs Nov. 5-6.
Tickets: $75 for reception, $25 for showcase. Call (310) 550-4753.