I've made lego cards before (here) so this was the first theme that came to mind when I needed to make a 9th birthday card for a friend's Son. The actual lego pieces are fairly simple to create - various squares and oblongs with punched paper circles mounted on top using foam fads. The hard part is to arrange the pieces so that the same coloured blocks aren't touching!
The result - a very bright card for a young lad.
I've entered this card into the current challenges at:
Through The Craft Room Door Challenge - anything goes
Make My Monday Challenge - bright and cheery colours
Enjoy your day