Since we're talking about Legos and constructing things, we thought this would be an appropriately themed book:
Create 36 paper-folded Star Wars creations! Part one has a great rundown of basic folds, bases and terminology and part two has the projects. Create lightsabers, battleships and all your favorite characters with specially designed Star Wars origami paper! Includes a foreword by Tom Angleberger, author of The Strange Case of Origami Yoda. Recommended for ages 9+.
Have a spectacular day!