I can't find the numbers for 1997 but I serious doubt the figure of 5. Here are the number for 1999.
"In 1999, 3,385 children and youth ages 0-19 years were killed with a gun. This includes homicides, suicides, and unintentional injuries.
This is equivalent to about 9 deaths per day, a figure commonly used by journalists.
The 3,385 firearms-related deaths for age group 0-19 years breaks down to:
214 unintentional
1,078 suicides
1,990 homicides
83 for which the intent could not be determined
20 due to legal intervention
Of the total firearms-related deaths:
73 were of children under five years old
416 were children 5-14 years old
2,896 were 15-19 years old
Gun Safety for Kids and Youth: Your Child: University of Michigan Health System
Teen Homicide, Suicide, and Firearm Deaths | Child Trends Databank