Landing begins a long time before you actually touch the ground.  The pilot and co-pilot will begin to lower flaps and slats and cause other mechanical things to happen.  Just like putting a tape in a VCR, when the pilot begins to do these things, noises happen.  Strange noises!  Noises like you might or might not have heard on takeoff.  They are normal.

     The Flight Attendant will begin to get the plane ready to land, too.  A sign will light up telling passengers to put on their seat belts.  This keeps everyone from moving around and makes you safer.  The Flight Attendant will be straightening up the cabin until the plane starts to land.  This saves them time since there is not all that much time between when the plane lands and when it has to take off again.

     Yea to window seats!  Here's when it's nice to have one.  As the plane lands, you can see all of the tiny people get closer and closer.  It's kind of neat.  The Air Traffic Controllers are talking to the pilot and sometimes two planes want to land at the same time.  Since THAT wouldn't be a good idea and the planes might crash into each other [not a good idea, either], your plane might be told to circle around the airport again.  This is called 'holding'.  Some people get upset about 'holding' because it delays them.  Get out that book you have been reading.  This might take awhile.
     As the plane finally lands, you will hear lots of different, but completely normal, noises.  Some of the noises will be caused by opening the wheel areas so that they come down for landing.