It very much depends on the child and what you do. Is she a runner, or does she walk nicely by you and do you go for long walks etc. I had a second hand double pram just for walks with my first two as DS1 was 3 and too big for a stroller etc but still known to run off. It's also good if you are out & about at a show etc for a long time & they can all rest. 2yrs is still very young. Could you get a second hand pram (with two seats) or a double stroller they are cheaper.