I have 3 kiddos that would need care during the summer and only 1 during the school year. They are 2 (girl), 3 (boy) & 4 (boy).
You would watch them in my home, do some basic review of letters, colors, shapes and so on. HavingMinimal TV but a little is ok. Having a schedule or curriculum helps with boredom and fighting. Fix snacks and lunch. Help with behavior correction as siblings don't always get along.
Monday - Friday from 8:30am - 4pm during the school year and 7am - 4pm during the summer. This is all very flexible.