Please think twice about this.
There is so much going on in the average household during Christmas. The tree with ornaments and tinsel that can be very dangerous to an inquisitive puppy. New toys your children leave laying around.
Most reputable breeders will not allow pups to go to their new home at Christmas. I know I won’t. I will hang onto the pup for an extra week or two for the safety of the pup.
I also try not to have pups ready around Christmas. But mother nature often does not work in that favor when it comes time for breeding.
The best solution is to buy all your puppy needs (bowl, collar, leash, toys, etc.) and wrap them up for your kids to open on Christmas day.
Than you can explain that there will be a new pup coming to your home in a couple of weeks and the reason why you are waiting.
Please think long and hard on this for the sake of your new pup. If the pup ingests something it could warrant surgery or even result in death.
Avoiding this and the heart ache to your family is best.