Computers offer wonderful opportunities for everybody. Many teenagers enjoy using their computers. They make new friends and chat with them on the Internet.
But on the other hand, children who spend a lot of time at the computer, spend little time in the open air, they have virtually no real communication with peers. Many teachers in schools note the limited knowledge of children, lack of interest in reading books. Children sit in front of their PC or laptop (notebook) for hours and it’s bad for their eyes! They can’t stop playing cruel and silly games and become nervous and tired. The computer is sometimes a mere waste of time. Parents are concerned that the children using the Internet are not protected from negative information, which can be found on many sites. Computers are dangerous and addictive.
But besides many disadvantages in using the computer by children, there are of course some advantages too.
Regarding the education of children on the Internet children can find all the necessary information that is not given even in the textbooks. The main condition - to be able to properly use the Internet resources, then the child will only benefit from the computer. Then the Internet helps greatly in children’s studies. They find the necessary information and ideas on the net and use them in their work. The computer helps you both to relax and to get a lot of new interesting information. To my mind it’s a useful gadget.
Meanwhile, Kevin wakes up to find the house empty and is overjoyed with his new freedom. He practices shooting with Buzz's BB gun, jumps on the bed, watches a gangster film, and eats a large serving of junk food, but accidentally wrecks Buzz's room. The Chicago Police Department arrive to check on him but are unable to find him and consider his parents' call a hoax. Kevin also deals with his fear of his next door neighbor "Old Man" Marley, who is rumored to have murdered his family many years earlier, and the The Wet Bandits, Harry and Marv, criminals named for Marv's tendency to intentionally flood the homes they rob. The pair are robbing the area's vacant homes and have targeted Kevin's. Kevin keeps the pair at bay by tricking them into thinking the house is still inhabited, but they eventually realize Kevin is alone.
Kate gets a flight to the USA, but ends up in Pennsylvania. She tries to book a flight to Chicago but they are again all booked. Kate refuses to accept the situation, and she is overheard by Gus Polinski, the lead member of a traveling polka band, who offers to let her travel with them to Chicago on their way to Milwaukee. Kate happily accepts.
On Christmas Eve, Kevin overhears Harry and Marv discussing plans for breaking into his house that night. Kevin goes to church and watches a choir perform. Marley sits beside Kevin and the pair talk; he learns that Marley is actually a nice person and the rumors about him are false. He tells Kevin he is watching the choir because his granddaughter is in it, and he never gets to see her because he and his son have not spoken in years after they had an argument. Kevin advises him to reconcile with his son.
Kevin returns home and rigs the building with various booby traps. Harry and Marv break in, triggering various traps and suffering burns, impalement and a lost tooth. While the pair close in on Kevin, he calls the police and escapes the house into a neighboring vacant home. Harry and Marv manage to catch him and discuss how they will get their revenge. Marley sneaks up behind the pair and knocks them out with a snow shovel. Shortly after, Harry and Marv are arrested, and tied to the multiple other robberies because of Marv's flooding habit.
On Christmas Day, Kevin is disappointed to find that his family is still gone. He then hears Kate enter the house and call for him; the pair hug. Immediately after, the rest of the McCallisters arrive, having flown directly from Paris to Chicago. Kevin keeps silent about his encounter with Harry and Marv, although Peter finds Harry's missing gold tooth. Kevin and Buzz forgive each other for their earlier argument. Kevin then observes Marley reuniting with his son and his family. Marley notices Kevin and the pair acknowledge each other. Buzz suddenly calls out, "Kevin, what did you do to my room?", at which point Kevin runs off.