Kai and children

We live near and elementary school and since Kai was 5 months old she has greeted the children through the fence. She sits and waits for them to go to and from school, that is on the mornings she decides to get up by 7:30. If she is not fence the children call her name and I have been asked on several occasions where Kai has been. She has also met up with children in the street and I have taught her on most occasions to sit or at least not jump on the kids. But I have never really had a child younger than 10 in the yard, so I was a little skeptical when a mom whose older kids were weeding my garden also left her 5 year old. But I need not have worried  because they became fast friends and Kai did something with that boy that I have never seen her do with the adults. When we play with Kai she gets her favorite toy, a Kong with fabric and strips hanging down, after a lively tug and war she releases it. When we throw it she brings it back, but again we have to play tug of war. When Kai plays tug of war she really swings her head and on many occasions I have had to drop the toy because she jerks my arm. So when the child picked up the toy I was ready for Kai to grab it and tug to roughly, but she didn't do it. She would touch the toy with her teeth gently and then back away, releasing the toy. She did this the whole time the child had the toy. I was very proud of my Kai for being so gentle.