yes, make a PS. We called 1 1/2 months before my daughters birthday and couldn't get anything for her birthday. We had planned to take the whole family. The next open time was 10 days later (which happens to be her dads birthday), and there were only 5 spaces left so we just took my parents with us.
You get a little cake (not a cupcake) that fits into the middle part of the Mickey head kids plates they use. Then you get little cups of 3 different color icing, and I think 3 differnt cups of decorations. Everyone gets their own cake to decorate and eat. You also get a small souvineer cup with fruit punch in it. And a mickey eared birthday hat. They have Pat E Cake come out and dance. You decorate your cake. Then all the birthday people do the conga, and then get to meet Mickey and Minnie (though I can't remember if they're both always there, I think the first time it was only Mickey)