This past week, a Milwaukee toddler fatally shot his mother after finding a handgun in the back seat of the car they were riding in. The case drew a lot of national attention given the unusual circumstances: Little kids rarely kill people, intentionally or not.

But this type of thing happens more often than you might think. Since April 20, there have been at least seven instances in which a 1- , 2- or 3-year-old shot themselves or somebody else in the United States: