If you haven't done the cookie baking thing with the kids, do that. My kids are 4.5 & 3 and they love it.

They get to help make cookies and in the end get a little container full of chocolate chips and 2 free cookies.
My girls also really love going into all the little houses in Toon Town. Have your kids pull on all the doors and touch all the stuff. Most of it makes noises.