Nanny Needed - Full-time / Part-time

Both kids like nature and being outside. The oldest (7) enjoys science, building, and learning -based activities. The youngest (3) is high energy and likes imaginative play. I would need childcare on occasional weekends primarily, sometimes during the day but sometimes in afternoon into evening (before 10pm); typical duration would be 4-6 hours. Bedtime is around 7 p.m.