Looking for late night babysitter for a few times a month (Santa Clara)

I have 8 and 13 yr old kids that need to be watched a few Friday nights and the odd weekday evening.
They mostly just need to be watched to not make messes and to be told to go to bed.
The older one will mostly be playing on his computer.
The younger one would either be do some sort of supervised craft or watching a movie.
Pretty low maintenance babysitting.
The hours generally run from 8pm-4am.
It would be most helpful if you had a car or a ride to my house.