My boys got Lego Star Wars sticker books for Christmas. They've been a brilliant present and keep them occupied for ages.
The books come with lots of reusable stickers and you have to work out where to stick them in the pages of the book.
The books have information about the Lego characters too. And the boys love looking at all the pictures of minifigures and vehicles.
As I write this, we've recently returned from a long car trip. They boys were happily entertained for hours in the car sticking Lego minifigure stickers in the right place and talking about Star Wars.
I think we'll be getting a Ninjago sticker book next, they're mad about the Lego Ninjago theme!