I came across this website a while back and told Leif about it. He uses it with Ellie. As I don't really use the computer with her, I had sort of forgotten all about it. But I had a bit of renewed interest today and went poking around a bit and discovered that you can print out worksheets for the activities as well! Ellie is VERY interested in letters and coloring right now, so this might be a good way to combine the two, and without a lot of expense!
Perhaps I'll print off a few and keep them in the little school desk I just got at a garage sale. She seems to think sitting at the desk is fun and she keeps asking to color while she's there, so that might be a good way to work on her letters while she colors.