Welcome to YT
I got Twinkle when my two daughters were (almost) 4 and 1 year old.....10 months later we added another yorkie puppy to the family. I had ground rules from the very beginning (the children must sit on the floor for the puppy to approach
them, not follow the puppy around, NEVER pick them up, and to leave them alone when they are in their crates - that is THEIR space) and I've had no problems whatsoever......
I'm not saying it's easy though.....there needs to be CONSTANT adult supervision, because obviously my children are babies, just like the puppies are, and any accidents would be totally MY fault. But that's where common sense combined with responsible parenting/dog-ownership comes in.
I firmly believe that children benefit greatly from being raised alongside animals (and vice-versa), because it teaches respect and kindness.
I also have larger yorkies - Twinkle is 8lb (still a VERY small dog), and Wicket looks set to be about the same. I'm not saying that their larger size eliminates any possibilty of any accidents, but it does take away a tiny bit of the worry.
Good luck with your decision! xxx xxx