how did scout jem and dill spend there summers

The three engage in summertime play activities of improving the Finch tree and acting out the plots of several of their favorite books. Scout notes that Dill proves to be, "a pocket Merlin, whose head teemed with eccentric plans, strange longings, and quaint fancies." When they finish with these pursuits, they garner an insatiable interest in Boo Radley.