I'd get a Lab or similar retriever if I were you.  Best disposition IMO of any dog, which means great with and safe around kids.  They aren't high maintenance either like a lot of livestock dogs which need to be worked constantly. 

We have a Lab x Rottweiler and a Flat-coat Retriever (think black golden retriever) who are just as happy laying in the sun, chasing a groundhog or playing with the kids.

Great farm dogs.