I stumbled across this video - and a number of other ones this guy did - who knows - he could even be a member on the forum:
https://www.youtube.com/watch?v=ulJJ4yxMaeo
But it appears he put together an interesting "beginner" series of vids back in 2007 - 2008 or so.
Search: DIY Laser Show: 1 , 2, 3, and so on.
Maybe people all know about them and I'm just finding it but, some good stuff there to perhaps direct newbies to. And I like the Lego idea.