Temporary Afterschool Help, For 2 Children

We are looking for help with our two children for a few weeks where our nanny is unavailable. We need someone who can coordinate pick-ups. We can share more details on schedules, but they generally have after school activities booked most days, so we need someone comfortable navigating the subway. Either my wife or I will be at home on these days to assist with anything that comes up. They are both cheerful and helpful. They are comfortable playing in park, biking /scooting, active play at home.