The family of Haymanut Kasau called for volunteers to join a mass search for the missing girl on Thursday.
Kasau disappeared from the northern city of Safed on Feb. 25. She is a third-grader at the Shevet Sofer school in Hatzor Haglilit.
She turned 10 years old on Wednesday.
Buses have been arranged to take people to Safed from across the country.
Kasau was last seen on Feb. 25 outside the Jewish Agency absorption center where her family has lived since making aliyah from Ethiopia three years ago. A security camera captured her at the main entrance to the complex, where she had been distributing election pamphlets to residents.
Kasau is described as 1.20 meters (3’11”) tall and slim with dark hair and dark eyes. She was wearing a white shirt, a black skirt and pink pants at the time of her disappearance.
The Jewish Agency is offering a reward of 100,000 shekels ($27,500) for information leading to her location.