Rainbow Day Camp in El Cerrito, California, accepts children between the ages of four and 12.
At check-in every day, children choose which pronouns they wish to be referred to with for the day or they can choose to be considered neither male nor female.
Since opening three years ago, it has swelled in popularity and now looks after 60 children a day. The camp has received interest from several other states and has been contacted by parents overseas including a family in Africa.
It was created by founder Sandra Collins whose daughter Scarlett, now nine, revealed she was transgender when she was just two years old.
The camp ran for three weeks this year between June 26 and July 14. The children arrived every day at 9am and played together until 3pm at an independent school that was rented for the occasion.