If you like amusement parks then:

For pure fantasy, nothing beats Disnyland in Anaheim.

For Nostalgia and wild rides go to Knott's Berry Farm in Buena Park.

For the most world class roller coasters in a single park, go to Six Flags Magic Mountain in Valencia.

For the Hollywood flair try Universal Studios (with the added bonus of shopping at the Universal City Walk).
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I'd rather be ignorant than stupid. Ignorance implies a lack of knowledge which is easily correctable through education. Stupidity implies an inability to learn. Therefore; ignorance is temporary, stupidity is forever!