Does any one have any ideas for a skateboard party indoors in December for a 9 year old boy???

Well, you should make a skateboard cake :P 'cos that would look awesome and you should buy mini skate boards, they're really cheap and you could have races with them or competitions making them do tricks (you just flick the back of them and you could give prizes) ifyou wanted you could go down to the skate park and hire and instructor to either just show the kids some tricks or if your brave let him teach some of the kids