kiddie land

noun3

1. •
   A designated area for children.
2. •
   Playgrounds at parks and picnic areas, indoor playplaces, arcades, and family fun centers.

   • That's why it is a welterweight railroad — a line that falls somewhere between a kiddie land special and the standard lines that have survived through the boisterous history of American railroading. — 1949
3. •
   A specialized area within larger amusement parks featuring slow-moving, gentle rides, playgrounds, and attractions specifically designed for young children and toddlers; including miniature versions of ferris wheels, carousels, and boat rides.

   • [...] the wide-model Roller Coaster encloses an area of approximately 4000 sq. ft., some operators use this space as a “Kiddieland,” placing as many as three additional kid-rides in the center. — 1961