They are doing a huge rebuild of It's a Small World but it won't open until mid November. The biggest thing they are doing is swaping out the water way for something deeper. The floom and boats were originally built back in 1964 for the New York World's Fair. Unfortunately, people have gained alot of weight since then and the boats have been getting stuck because of the additional pounds.

Since you have small kids, you probably won't be able to get on some of the bigger rides such as Space Mountain. Disney does however, have a Parent swap system. At the enterance to the ride, ask the cast member for a child swap pass. Then you wait in line while you wife waits at the exit of the ride. Once you come off the ride, they will let your wife ride without having to get back in line again.

Another thing to use is the FassPass system. You get a free ticket with a time stamp on it. You can then return anytime after the time on the card. Remember you don't have to use it within the timeframe given, you just can't use it earlier than your scheduled time.

We went to Disney a couple of years ago when the kids were 3 and 5, and we had them both carry a little card withour cells on them.  They were told that if they got lost, to find an adult with a nametag and give them the card.