Simplify the following text for a Grade 8 native English-speaking person.
Original: He is the namesake for Disneyland and Walt Disney World Resort theme parks in the United States , as well as the international resorts Tokyo Disney , Disneyland Paris , and Disneyland Hong Kong .
Simplified: In the 1950s Walt Disney created Disneyland in Anaheim California . Disneyland was the first modern theme park .