. We'll be at WDW in October for the first time with kids. Does anyone have any ideas of how to entertain a 14 month old and 2 1/2 year old while waiting in line? Thanks in advance!

Please don't bring bubbles! On my last trip there was nearly a fist fight over this. One family had two children blowing bubbles. They were going everywhere. The people in front of them asked them to stop. They didn't. They asked again LOUDLY. No response. Then the guy finally turns around and said if they didn't stop the kids with the bubbles he was gonna put a boot in someone rear. (But he didn't say rear) It was ugly.
You guys have given me something to think about with the bubbles.
But couldn't that situation have ended if the family had just put the bubbles away when first asked??
To me the problem here seems to be rudeness, not a bottle of bubbles.
I think we'll bring them, then be careful about where and when my youngest takes them out. (I'm pretty sure my 2 older kids are far too sophisticated for bubbles.)
Thanks for a point of view I hadn't considered.
But if no one says anything and your youngest spills (which kids are prone to do) leaving a slippery mess, then it WILL be the bubbles and not the rudeness of not putting them away when asked.
Mine like to pop the bubbles. Again, not in crowds, but there are times when letting them out of a stroller to stretch their legs a jump around a bit are great! 
bubbles!
I always bring the really small tubes or bottles from weddings and they love it.