Yep, what princessclem said!
As for distracting the baby, not at all. In fact, variety always makes it more interesting for the baby, not to mention it would really allow her to understand more clearly that color, font type, is not relevant to what we're showing them. In a way, it's similar to showing the baby many different types of dogs, so he doesn't just associate 'dog' with a particular type of dog.