Occasional Babysitter For 2 Toddlers

Looking for occasional help on the weekend and/or weekdays. I currently have a nanny 2 mornings a week but am looking for backup for when things come up or if I need additional help. We have a 3-year-old girl and 18 month boy. Both sweet & busy. :) The kids love going outside, listening to books, playing with their toys and each other. They need help with meals, potty (1 still in diapers, the other is fully potty trained but needs help with wiping) going down for naps and just someone to play with them or do activities. We're looking for someone who is reliable, consistent, warm, caring and trustworthy. Our home has fairly easy street parking. Our family includes one dog, Boone, he is a labradoodle and full of love and energy.