We were there this past July and I mentioned to everyone, and it was on our reservation that we were there celebrating my daughter's 16th birthday, it was her birthday trip with 3 of her friends, we got squat!! I tried not to expect anything but we were registered, we were there for 10 days at the Beach club villas, they were asking her what her favorite character was, and maybe because her answer was Tinkerbell instead of Minnie, she got nothing in recognization of her special day. I have heard of some people getting the cards and balloons, but we had no luck. I sent a co worker and her family to OKW on our points and their daughter was celebrating her birthday and they did get the balloons and card. It really is a nice touch. My 16 year old would have loved it. She did get sung to at the Rainforest CAfe which did make her day. Oh well, the trip was one of a lifetime that her and her friends won't forget, it was fabulous, so those are memories she will have forever, and we will too.
We used the bike and boat family plan at the wilderness lodge and they loved that. They were pretty much on their own. I took them to PI once and then when my older daughter and friend came down, they took them to PI again. They loved it. Lots of things to do besides just the parks.