Sorry we didn’t catch this earlier but you can get a free King Jr. Meal when you purchase an adult combo meal. Each King Jr. Meal includes a junior entree (cheeseburger, chicken nuggets, hamburger) junior side and junior drink.
The promotion runs through September 3rd, so you still have time. You have to order online or through the app to take advantage of this generosity. (Go to the “offers” tab on the BK app and when you choose the combo meal purchase, the free King Jr. meal unlocks.) Not valid during breakfast hours.