Babysitter Needed for my Children

Would need to pick up 3-year-old at daycare 2-3 times a week before 3:30 p.m. (15 minutes away) and watch all 3 of them until 7 p.m. 2-3 days a week. Mondays and Tuesdays are most likely consistent days. Unsure about the 3rd at this time. My 89-year-old mother will be in the home. The two older children are self-sufficient.