Those are my two. There are so many definitions of unschooling so I won't even go there. If your desire to unschool is because you want child led learning then isn't that what you are doing? I do try to encourage my kids to get on the same page as much as possible just because it is easier and more time efficient to do activities with both at the same time. Your kids are very young though and the time issue shouldn't be a problem for another 4 years or so. Learning styles are always changing so you never know what the future might bring.