No carseats needed. Infact our Mears bus was so crowded the kids sat on our lap. That was two years ago. We have since used a towncar service. It just makes things easier w/the kids so young(4&5). Not to say now that they are offering that Magical express I havn't thought about using them again. DH will have nothing to do with it. He likes the luxory of the towncar. Oh well, I guess I will have to let myself be spoiled.