You can enjoy a year of free Jr. Frostys from Wendy's with a $2 donation to the Dave Thomas Foundation for Adoption.
The foundation helps find adoptive families for children waiting in foster care.
The Frosty Key Tag costs just $2, and it lets you get a free Jr. Frosty with any purchase. You can use it once per day.
The key tag is on sale at Wendy's restaurants through Dec. 31 while supplies last, according to Business Insider. You'll be able to use it throughout 2019.