Look!" The big boys just frowned. That would mean that they are thinking that Jerry is very immature. A more mature kid would've got the boys attention by asking for it, not by making a scene. Another immature quote from, "Through the Tunnel" would be "cried openly, fist in his eyes." This quote was from when the big boys were leaving him, on page 480. A more mature boy would've asked politely, "why are you leaving me?" This is also what a baby, or a small child would do if he didn't get his way. Also a more mature boy wouldn't even have cared, if the big boys left him. After Jerry decided to swim through the tunnel he became more mature. An example of a mature behavior (page 482-483) from the story would be, Jerry deciding to be smart, after he swam through the tunnel. He had a bloody nose and was dizzy. Instead of crying, he decided to go lie down instead and relax. An immature boy would've went and cried to his mother. A good quote would be, "After a time, his heart quieted, his eyes cleared, and he sat up." This would show that he is not panicking, and he is being