To describe the code-switching in the speech of pre-school, bilingual Afrikaans-Dutch children, novel language data of eight preschool children between the ages of 2;3, and 6;4 who are raised bilingually in Afrikaans and Dutch in South Africa were collected and analysed. The parent-report method was employed to collect the data, and the data collection period lasted a total of approximately two months. The NWU HSSEC ethics number for the research is: NWU-02043-20-S7