At an amusement park, you can go on exciting rides and do a lot of other activities. (Image source)
They can also be called “theme parks,” especially if there is a specific topic – like Disney World. (Image source)
In a roller coaster, you sit in cars that run fast along a track. Sometimes you might go upside-down!(Image source)
carousel / merry-go-round
A carousel (or merry-go-round) is a good ride for small children.
A ferris wheel slowly rotates and brings you up to the top for a nice view.
You drive “bumper cars” around a limited area and try to hit other cars. (Image source)
A waterslide is filled with water and usually ends in a pool. Sometimes you sit directly on the slide, and sometimes you sit on a tube (round thing filled with air, with a hole in the middle). (Image source)