Word of mouth is the best promotion for your event.  If everyone in your organization tells two or three other families how much fun the event is going to be it usually will lead to a good turnout. 

Wayne will be happy to put up your posters at the fifteen schools that he regularly visits, and we can post your show in this website.

Try to get the event listed in the Boston Globe, Boston Childrens Music Web,  the Boston Parent Paper, and other places.

Wayne will be happy to do any radio promotions that you line up.