What items are found in the knothole in the novel To Kill a Mockingbird?

There were several items found inside the knothole of the Radley tree. The first thing that Scout finds in the tree are two sticks of Wrigley's chewing gum. Initially, Jem is upset at Scout for chewing the gum because he believes that it is poisoned, but it turns out to be okay. When summer begins, Scout spots another piece of tinfoil hanging from the knothole in the tree. Jem and Scout find a tiny box with two polished Indian-head pennies inside. Jem believes that the Indian-head pennies are good luck. In Chapter 7, the children find a ball of grey twine and believe the knothole is some kid's hiding place. In the fall, Jem and Scout find two small figures carved out of soap that resemble themselves. Less than two weeks later they find a whole pack of chewing gum. Then, they find a tarnished spelling bee medal, and four days later they find a pocket watch on a chain and an aluminium knife. Jem and Scout write a letter to the person who has been leaving them gifts, but Nathan Radley covers the knothole in cement. The mysterious Boo Radley was leaving Jem and Scout gifts in an attempt to communicate with them.