The Honda seat covers are an excellent choice for the rear seats as they are very from fitting by way of being in several pieces. They don’t look like a sofa throw. The only downside is that they only come in black and are a PITA to take on and off. If you go with them you’re probably going to keep them on all the time.
You may also want to consider something for the backs of the front seats when those cute little legs get long and more active.