The first gift that Scout discovers in the knothole of the Radley tree is two sticks of Wrigley's Double Mint chewing gum. In the following chapters, Scout and Jem discover two shiny Indian-head pennies, a ball of gray twine, and two soap figures that resemble themselves. They also discover an old spelling bee medal, a broken pocket watch, and an aluminum knife inside the knothole of the Radley tree. The gifts demonstrate Boo's friendship and are his way of communicating with the children. Jem and Scout are both perplexed and initially think that the knothole is someone's hiding spot. Although he doesn't say it, Jem begins to suspect that Boo Radley is the anonymous gift giver. Unfortunately, Nathan Radley plugs the knothole up with cement in order to stop his brother's attempts to communicate with the children.
Scout discovers the first 'gift': gum. She promptly devours this and only later confides in Jem that she found it in the tree. Other gifts follow in chapter four - two Indian head pennies. Then over the course of the next few chapters, they discover more gifts - a ball of twine, two hand carved figures that represent Jem and Scout, a medal, and finally a pocket-watch and a pocket knife. These, of course, are left as tokens of appreciate from Boo, who obviously has been watching the kids and their plays and games. In this way, he appears to find them as fascinating as they find him. The gifts however, come to an end when Mr. Radley has the hole filled with cement, cutting off Boo's means of communication.
pocket watch, drawing of a bird, crayon, harmonica, pearl necklace, marble, wisel and toys
the first gift that appears in the knothole of the tree was some gum that scout found.