The Los Angeles area has its share of theme parks. You've got your Disneyland, your Knott's Berry Farm, Your Universal Studios Hollywood. But they don't hold a candle to Legoland.
Legoland has the inherent advantage of being themed around one of the most universally loved things in existence: Lego. Everybody loves Lego. Kids, adults, boys, girls, non-binary individuals, the list is endless. Legoland has something for the ride enthusiast and the artist. The things they build out of Lego will impress you.
Legoland is the only park near LA you'll be able to go to and see fun little yellow guys that AREN'T those minions. Legoland is only sort of lacking in the thrill ride department.
Legoland doesn't have much in terms of huge coasters. It has some longer darkride-type rides that are suitable for families with little children, and is sure to please any youngster.