What evidence now suggests that the items in the tree are meant specifically for Scout and Jem?

The evidence that suggests the items in the tree are meant specifically for Scout and Jem is that they consistently find objects that are significant to them, such as gum, pennies, and soap carvings, in the knothole of the tree. The items seem to be personalized and tailored to the interests of Scout and Jem, indicating that someone is leaving them there intentionally for the children. Additionally, the fact that the items appear only when they are alone further supports the idea that they are meant for Scout and Jem.