This is definitely a fun thing to do with your kids if you're bringing them to Sin City! Like other Yelpers have mentioned, you've got to get the Around the World soda sampler on the 2nd floor. For $7 you get to sample 16 sodas from around the world, and even though there were 5 of us, it was still a lot of soda!!!
It's free to take photos with the Polar bear downstairs. They will take 2 shots of you with their camera for you to purchase if you wish (you need to pick it up upstairs, but because of the green screen behind you, they are able generate a cute background), but they will also take one picture with your own camera for free.