My friend Serra had a baby several months ago. She had this carseat cover, which I thought was awesome. I have always covered my babies with an afghan from my Grandmother. The problem with that is that it often falls off, and I view the afghan as an heirloom. Plus, she passed away close to two years ago, so McKenna wasn't going to have one. This was an awesome solution. I borrowed Serra's for a pattern and got to work.
It is really simple. It is two different fabrics (though it doesn't have to be). You then have your two Velcro tabs, put a bow on those for "cuteness", and you are done! The edges are serged with a roll hem. I could not for the life of me find my serger manual, so my mother-in-law was nice enough to do that for me (I found my manual today though--yeah!).
Here it is in practice. It is great because it doesn't fall off. Also, you can still hold the handle.