Babysitter - Full-time / Part-time

Hello! I need help with my 4-year-old son who loves to play! I have an irregular schedule as does my husband. We are looking for someone to fill in the gaps where our schedules may overlap leaving our son alone. It could be a few hours one day and a few more the next. This would be part time and never include weekends. In the month of August, I need someone a bit more to start. This person needs to be very very flexible. Pay can be discussed. :)