Designed to celebrate the 50th Anniversary of the Lego Brick in Australia the event will take place over the months of April to December 2012.
As of April, there will be a website on the event at www.LEGOfestival.com.au (though there is nothing there now) but there is little else about the event.
I did manage to find a page on the design of marketing for the event. Designer Andrew Guirguis, working for One Green Bean Ad Agency who handles Lego In Australia shared his inspiration for the look of the promotion.
Among the merchandise and posters is an invitation to an event called the Lego Forest, to be held at Circular Quay on the 8/6/12 .
Rest assured if anything else turns up about the Lego Festival Of Play I will let you know 🙂