on-campus tutor/baby sitter for a 5-year old boy

Hi,

I am looking for a baby sitter or tutor that works on campus, who will accompany my five-year old boy when I worked on campus during off-hours. The working location will be close to Stanford engineering quad. The working hours are flexible, around 1-3 hours each time during weekend or occasionally during evening.

Thank you! Stanford students or affiliates preferred.