Hello, Angela!
There are many games inside the parks at Walt Disney World, some of those which are included in the cost of your park pass, such as those at
Innoventions at Epcot, result in prizes such as a certificate which can be sent to your home via email, rather than a larger, physical item. Also at Epcot, there are some fun games at Project Tomorrow: Inventing the Wonders of the Future, located at the exit of
Spaceship Earth. There are similar interactive games at
Mission: SPACE Advanced Training Lab, as well, which are really fun and futuristic.
At Disney's Hollywood Studios, you'll find arcade games at Pizza Planet, for the typical fee per game you'd expect to see an any arcade. There are several arcade games there which result in a possible prize, most fittingly "The CLAAAW!" (Say that in the voice of Toy Story's Little Green Men for a giggle...)
Similarly, there are prizes which can be won, for an additional participation fee, over at Disney's Animal Kingdom. There, you'll find carnival-style games at
Fossil Fun Games, in the Dinoland U.S.A. section of the park. You'll pay a separate fee each time you sit down to play.
Another favorite is at Magic Kingdom:
Frontierland Shootin' Arcade. Again, for an additional fee, Guests can test their marksmanship with infrared light rifles. If you have competitive folks in your party, be prepared to battle for the best score!
Send more questions as you think of them! I'd love to help!