Our kids were 2 and 3 when we went in 2004, so we bought the Jeep double one from Toys R US for $70 and used it whle on holiday. We were there for 17 days so got our moneys worth.
We will return in Feb and will do the same again. They are pretty handy to have as the kids will get tired during a day in a park. And we can dump jumpers, raincoats and other gear in them too. We will not bring it home as its too much hassle with three cases (we buy a lot over there

)as well