R.,
After you have checked all the normals...hungary, sick, clothing too tight, too hot too cold, teeth, and ALL the other Mommy checks.........try clapping your hands rappedly and loudly saying"Where is My Boy?" to get his attention, then SMILE when He stops whining. No more whinning? Hand him a new toy or a pot and a Huge spoon to bang with, or an old toy that he hasn't played with for a while. ALWAYS Rotate Toys! Use his favorite stuffed animal and Play "Hugs,kisses and tickles" with his stuffed animal hugging,tickling and attacking him!
Also, you can blow in his face. It doesn't hurt him. Makes no noise and after a few days of this; he will relate this to stop that behavior. Always remember when he stops just SMILE and turn his attention to something else.....trees out the window or ask him questions like: Where's Daddy? Puppy? etc.
Indian mothers would squeeze their childs heel. This was a signal for them to be "Quiet." "Danger is near"
He could just be bored,,,try teaching him a song or singing some SILLY SONG that will get his attention. Make sure you really over act, be flamboyant and Goofy and LOUD!!! Giggle wildly....children and babies need play, especially Silly Play.......adults too! It relieves Stress. In you too!
Take walks,cuddles and tickle games. Play tiger or dinosaur. Children enjoy getting "You" , so acted scared and suprised! duck behind the couch or counter top;then pop up when he stops whining to look for you! Yell Pick-a-Boo!
Watch to see if after the baby has been crying or fussing,he may be just trying to do what the baby does or he could be mimicing. Watch him, is there a pattern to his whining? Is it a certain time of day or night? Before or after nap time? He may be just trying to tell you about how hard his day has been or that he over did it yesterday (played too hard). He will stop, have no fear the whinning will clear!!!! LaDonna P.S Note ...the whining will return through the years, so just keep trying new things.