Take 417 (the Greenway) from MCO, and I-Drive S to WDW. 20 minutes max for either trip.
I did comment during an August meeting at the JW - 'ok look, a KID in the lobby!' since they were so rare at the time. (shortly after the resort opened)
(I love kids and my staff will call me out of my office to hand out toys to kids in the lobby)
Having said that, the Ritz and JW had some great family and kid oriented things in their Dec resort newsletter last year, like Teddy Bear picnics and carriage rides.
They will do a great job for you, don't worry!