DD1 will be 4 next month and we are planning to get her new booster seats (two cars) so that DD2 can have her seats and The Stowaway can have DD2's seats.
Problem is I want to change the seats over before her birthday and that means she will have the seatbelt before she is actually 4 and it is legal (am I right on this one?)
Would you do it? On one hand I want to be prepared but I don't want to do the wrong thing by DD1.
Oh and can anyone tell me what is meant when a seat is described as antisubmaring?

