https://www.siliconvalley.com/2021/01/25/status-update-rite-aid-offering-free-covid-19-swab-tests-to-kids-as-young-as-4/

The drive-through tests, which had been available for children as young as 13, are available at 460 Rite Aid stores in 16 states.

Funding for the tests is provided by the U.S. Department of Health and Human Services department or HHS.