sunnyvale rod and gun says "6 and up"
no mention of kids rates, so I guess it would be an extra $15 which kinda seems high.
However, there is a nice lake nearby across the street and several areas to check out the stream just little further up the road.
IIRC they also have several "22 only" ranges and a "22 only rapid fire" range.
Firing periods are 15 minutes or the discretion of Range Master.
No children under 6 are allowed on the range. Children age 6 through 17 must be coached by an adult who is within arm's length and paying full attention to the minor child .