Last year we were at the Poly in a lagoon view concierage room -- that we got as a free upgrade! I had booked a garden view concierage room and was pleasantly surprised to see the upgrade. I think it was due to the fact that we were celebrating two birthdays during our stay -- mine and my DSs. I had also developed a rapport with Tara, who helped me with dinner reservations, etc.
For my birthday, which was the day we checked in, I received a signed photograph of Snow White as well as a palm frond basket filled with all kinds of Hawaiian goodies. I was really surprised since I had stressed to Tara that I didn't want anything for my birthday. It was wonderful to spend our first evening sitting on the patio eating my macademia nuts while watching the fireworks.
For my DS's birthday, I had ordered some special things from Pixie Gifts and asked for Tara to arrange a bouquet of balloons that I could decorate the room with. The hotel surprised us with a great Mickey Mouse cake, noise makers, hats, and a certificate with Tinker Bell on it. Oh, and a card from Mickey, too! What a great surprise. I had heard that these things could happen but didn't mention them to my DS in case it didn't happen. I had brought along a lot of other surprises and decorated the room myself. This thrilled my DS!
I know that you can order cakes with the help of the hotel staff. They will also be happy to help arrange whatever you need and charge it back to your room. I had special packages in the room for both of my DSs that included lanyards. These were all charged back to my room. Happy planning!