You can get a cheap Android tablet like this one...

http://www.newegg.com/Product/Produc...82E16834320005

I don't know much about Android devices but from what I know certain versions of the OS have limits to how high of a version to update to. This may be an issue if the latest Angry Birds requires 2.6 and your tablet only does 2.1. My point is to look into what games will work on the tablet first.