Junior Kindergarten and Kindergarten students begin their academic careers at Fort Worth Country Day in the Butler Kindergarten Building. The building was named in honor of the school’s third headmaster, Geoffrey C. Butler, who led the decision to move from half-day kindergarten to a full-day kindergarten program. The building opened in 1992 and in addition to four large kindergarten classrooms, there is a large commons area for student enrichment programs, an art room and the office of the Lower School Health and Wellness Counselor.
Outside is the Melinda Miller Playground, named in memory of the school's Kindergarten teacher from 1966-1999. The playground is an age-appropriate self-contained play area replete with small habitat garden, a variety of play equipment and open green space.