what incidents before halloween night give an idication to Boo Radley's intrest in a friendliness toward the childre

There are successive gifts left for the children in the tree at the end of the Radley property. Each gift was meant for Scout or Jem (arrow, soap statues....). Boo probably also mended Jem's pants when he tore them on the Radley fence at night.

Boo Radley covers Scout with a blanket in the cold during the fire in Mrs Maudie's yard.