Bike carrier for cars? Can they carry kids bikes?

[LadyMuck]

I am looking for a way of carrying our kids bikes without putting them in the boot. Halfords told me the boot was the only option, and that the bike carriers which hang out from the rear of a car (ours in an estate) can only carry adult bikes. We have bikes for a 3 and 5 year old, the former with stabilisers. So I need to know whether he was talking rubbish or not - any ideas?

We have got a halfords one and we got a bar thingy that goes from the handlebars to under the saddle to make it so that the poles strap on iyswim

But it is not very good in reality but we hardly use it

ours is a volvo estate

ooooooops sorry just saw the ages

ours is for 11 year old

so don't think this bar thing will help

sorry

bump - anyone else?

Another bump before I post this as a Centreparcs question!