The Question and Answer section for Maniac Magee is a great resource to ask questions, find answers, and discuss the novel.
Maniac wanted to leave the Beales' house because he felt that the things that were being done or said by East Enders were causing emotional pain to the Beales.
One sentence is pretty hard. We learn how Maniac Magee has all the makings of a legend. One sentence isn't adequate to sum up an introductory chapter.
The two decorate the small space with a wreath, strings of popcorn, evergreen branches, and even some real Christmas decorations - a porcelain Santa, a partridge in a pear tree, and a wooden reindeer big enough to ride.