Citizens of the United States of America, Canada, United Kingdom, Australia, Commonwealth Countries, and most European countries do not require a visa to enter Botswana for stays up to 90 days total, within a 12-month period without a visa.

Please check your requirements here - https://evisa.gov.bw/#/

Mandatory requirements for parents travelling with children below the age of 18:
- Certified unabridged birth certificate for all minors.
- A letter of consent from the other parent should the minor be travelling with only one parent.

www.botswanaembassy.org