Getting them used to people and kids would be a good thing. My cousin's cat acts like it's medicated. It's sooo relaxed, and great with her kids, only about a year old. My dog was similar, in that despite being a big dog, she'd welcome stangers pets and cuddles [though she'd still bark at walkers by and cars. All dogs do that though], having been with us since we were ages 6 to 9.
Then again, my cousin's previous pet, a short wheaton terrier, had a lot of kids and strangers around it when it was young, but it was mad, bit a few people, and they had to give it away when they had kids [or put to sleep... people don't tell me these things. My neighbor's cat Butch, who'd been my friend since age 1 or so, passed away and I wasn't told for about 8 months, by my family or my neighbor. Same thing when our dog was sick, I didnt know till the end of it.... thankfully this was avoided when Canda, th other nextdoor cat died, and I found out right away. She was 23 years old!!]

Since the puppies are pretty friendly now I imagine they'll be fine, and they have a good lead in Izzy. Getting some friend's kid's in to lug them around should be good, so long as the kid's aren't too energetic. You don't wanna overstimulate them :)