George and Basic Shapes
George and Basic shapes cartridge is the included cartridge with the original Cricut machine. The cartridge has a nice hybrid combo of items, with a basic font, and basic shapes (just as the name implies).
The George cartridge supports sign, slotted, charm, silhouette, shadow, and shadow blackout.
If you did not get this cartridge with your Cricut, then it can be somewhat hard to find, but some retailers do carry it from time to time if you watch. Another good place to look is on eBay.