Keys: r, u
The purpose of Stage 3 is to help you learn how to use the r and u keys all the while maintaining your fingers on the home row and alternating fingers to get to e and i.
This stage starts with a quick review of the home row letters as well as the e and i keys. The bar on the bottom has eggs that help you keep track of how far you have entered in the stage.
The pointer fingers of your hands are used, much like in Stage 1, where you used them to press g and h respectively. This means that your right pointer controls f, g, and r whereas your left pointer finger controls j, h, and u.