Tree hurt

A few days ago I noticed that our Japanese Lilac Tree had three big gouges on it's side. The Japanes Lilac was planted 2 years ago and is doing quite well. I am quite sure that the neighbor boy and number 3 had a hand in this, but cannot proof it. I tried to explained to number 3 that trees are our friends (and birds) and that hurting them is not OK...Hopefully this will be the end of this.

Japanese Lilac buds