
If you have children yourself I would keep this to a one to one, one child on the floor handling some tasty titbits and just let one pup in the room, don't put any pressure on it and when it enters have the child looking away. Border Collies can be funny about eye contact, let the pup explore and find the food, when near to the child offer it gently without looking at the pup. The important thing here is to let the pup do the work for the food and it should see the child is not a threat. I am assuming the child is old enough to be able to do this.
Don't force the pup at anytime, if it doesn't work the first time, try again later, no eye contact and definately one pup at a time, if you can get the bolder of the two to accept, the other one should follow.
Good Luck
Sandra