Finally we have got the 3 mums and 6 kids outside - talk about a todo when we walked the mums first into the paddock and then picked up the kids to rush them out, sounded like the end of the world with all the screaming! All this for the 2 minutes they were apart.
Thanks everyone for all the advice, it is great to be able to post even the dumbest of questions....
The paddock is like Fort Knox, hopefully escape-proof!