If you could find a friend or relative with a child you could practice with Izzy on a leash; have the child hold a treat, then have the child call her name. As Izzy approaches the child, he/she can give her the treat. All this time you'd be holding the leash and watching Izzy close of course, in case she snaps or wants to bite the kid.
Then Izzy can associate treats with kids and it would be a positive experience.
But since you can't "find" a kid, I don't know how else to remedy this. I'm sure others will have some advice for you.