Casual babysitter with regular weekly booking

Hello! We are looking for a reliable babysitter who can help us on a casual basis. We have two boys, so would mostly need your help to play with the kids, give them dinner (we can pre-cook this), and bath/bed. At the moment we only need casual support - once per weekend (we can be flexible with timing) but would look to making this a part-time arrangement (eg 4 hrs every Thursday and Saturday).