How to Play Super Mario on your Calculator - YouTube
fx-CG20 | Graphing calculator | CASIO
Casio FX-CG20 Graphic Calculator High Color Display Screen Limited Edition - Walmart.com
Casio FX-CG20 Graphic Calculator High Color Display Screen Limited Edition - Walmart.com
Update: It really does go without saying, the FX-CG50 is a beast of a calculator. But my trusty FX-991EX is still good for a lot of things. They are both good calculators. :