Most young kids do things to see where the boundaries are.  My daughter, while sitting in her highchair, constantly takes a piece of food between her fingers and puts her hand over the edge of the tray.  She looks right at me and stares. About 3 seconds later she drops the food on the ground.  I tell her not to do it everytime.  It seems like she's contemplating whether or not to drop it.  It's gotten to the point now that if I shake my head no while she's looking at me and thinking about dropping it, half the time she'll reconsider and put the food in her mouth.  Like the others have said, it's frustrating but be consistent and repetitious.  He'll get it soon enough.

how old is you boy if that's him in the photo18months-2yo?for baby around that age or older to 3 it's the age.just repitition and telling him calmly and the consequences(which they do not know about till 6-7 i think)or telling him your way of course.only repitition at their age.talk to him even if you think he won't understand they often suprise you.they are smart little creatures.I also have found too that kids do certain things as know that you will react and they LOVE it no matter which way you react.good luck

Hi there,

don't worry it is just a stage!1 Soon he will want to play with them and not throw them lol!!

Cate did this too, but it passed quickly..I would just tell her--- we throw a ball, here is a ball for you to throw! We don't throw books, baby, etc..

I said it definitley lots and lots of times, cuz little ones forget, but soon enough she outgrew the stage..

Good luck!

my 15 months old son did the same until he started day care and they taught him to  ease up on the throwing.. Just keep in mind that at this age  the consequence side of the barin isnt working effectively so even after being smaked or yelled at, they will often do it again.. It develops with time (and in the mean time.. soft toys are good..lol)