Chloie Leverette, 9, and Gage Daniels, 7, were first thought to have died in a house fire that claimed the lives of their grandparents Molly and Leon McClaran on September 23.
An Amber Alert was issued after investigators were unable to find their remains.
Donations to the reward fund can be made at Regions Bank in Eagleville or Shelbyville.
Anyone with information is urged to contact the TBI at 1-800-TBI-FIND.
Permanent link to this article: http://www.thunder1320.com/?p=16628