ds is 16 months and has very recently started to throw things at people and hit people, i have no idea where he has picked it up as he is not in nursery yet and is with me every day. Has anyone else had this and what is the best way to deal with this as if i tell him off he just smirks and finds it all very amusing before trying again, i have a playpen which is rarely used as he doesnt like being in there so i have started putting him in there and leaving the room for 2 minuites as his punnishment but this doesn't seem to be having to much effect either??? Is this normal toddler behaviour and will he grow out of it with the right discipline??