Get one! It can't hurt, it will only help your child "fit in" with the rest of everyone else standing in line! On our 1st trip, then 3yoDS didn't have one or seem to care, he did ask, though, what the other kids were doing! This trip is 3yoDD's 1st trip and she has one if she wants it! Now-13yoDS, is not taking his book back so, comparing one to the other is out of the picture for me but, I'm ready! DD also has Minnie floppy hat and laundry marker to get her hat autographed! Whatever works!
I've also pre-printed two sheets of 8-1/2X11 good quality paper, autograph pages. Added some text, "Kelly's 1st trip, 2001", etc. and added some movie camera stuff around the edges to simulate Mickey. I'm hoping to get some "Hall of Fame" autographs on these to frame and hang on her Disney-room bedroom walls! On either side of her First Disney Share of Stock, which we're saving until we come home! Also considering bringing a BD card for someone's future BD! (got this idea from the community board! sounds cute!)
There's so many ideas here!! Get the autograph book, At Least!!!