Throwing things seems to come naturally for kiddos - in fact just today I had a student who chose to throw things all over my room and ended up having a big clean-up job at the end of his adventures.
A few weeks ago we put some structure to the tendency to throw things by playing a game.
First we had to create a target. I got a piece of recycled poster board and drew 4 shapes on it. A few of my students helped to color in the shapes.
Next, I took the target outside to our playground and taped it on the building wall (using Mavalous tape - have you used this stuff? It's AWESOME - this tape lasted us multiple times of taking the target off the wall and putting it back up again and it's still sticking on a wall in my closet for the next time we use it).
I placed a container of bean bags about 5 ft from the target and we took turns throwing bean bags to see which shape we could hit. The students would practice their shape names with each hit. I watched their accuracy and had the more experienced throwers see how far back they could stand and still hit the target.