N.W.
Hi L.,
He needs to know that this is not okay but without him getting too much attention. Children will do something to get a reaction even if it isn't good. Next time he does it, go down to his level, look him in the eye and say "No, we don't throw" and then remove the toy and him if anyone is in danger of getting hurt to an area away from everyone. Don't say anything else and don't even look at him. This way he will begin to realize that his behavior is not getting a reaction. You can also try a time-out area but only for a minute or less.
Don't worry, I'm sure its just a phase he is going through and its pretty normal for his age. 1 year old's love 'cause and effect' i.e. I'll throw something and just look at all the attention I get!
Try to be consistent and firm and develop a "teacher voice".
Good luck!
N. W.
Williamsburg Nanny Agency