Just announced by the producers of the game, a demo for the upcoming LEGO Harry Potter: Years 1-4 game will be available for download online as of June 7th, this coming monday.
Offical demos for LEGO's video games are not at all unusual with the company's usual methods of marketing.
In the past, LEGO's demos inculde the full first level of the game, which can be played with two players using
a drop-in/drop-out feature, allowing a second player to simply jump in or out of the level at any time.
One major flaw in these demos is that, when playing the demo, it is impossible to save in the middle of a level.
A reminder post will be released shortly after the demo becomes available.