I saw these in the Magic Kingdom today but as far as I can tell they are available just about everywhere. Slinky Dog, you pull out his tongue put, put a coin on it and then pull the bone on his collar which dispenses the coin to a clear container inside of the slinky part.
Ker Plunk was one of my favorite games as a kid and now they've made a version using Little Green Men instead of marbles. Your kids will love it!
When visiting the parks pay attention to your receipts. My fastfood receipt today had a coupon on it for 20% off at Emporium, Mouse Gear, World of Disney, or the main store in Hollywood Studios or Animal Kingdom. The catch is it must be used between 9am and noon. Good until january 3rd.