Final answer:
In 'To Kill a Mockingbird,' the first gift that appears in the hollow tree is a pack of chewing gum. The children also find other gifts such as Indian head pennies, soap dolls, a medal, and a pocket watch.
Step-by-step explanation:
In the book 'To Kill a Mockingbird,' the first gift that appears in the hollow tree is a pack of chewing gum. Other gifts that the children find include two Indian head pennies, a ball of twine, two soap dolls resembling Jem and Scout, a medal, and a pocket watch.