Nanny for 3 kids

We are a professional couple looking for someone to help mind our 3 kids - 7 year old girl, 4 year old boy, and 11 month old girl on Wednesday afternoons from 12-5pm. Some light cleanup and food preparation would be required. Preferably a non smoker as we are a non-smoking household. No pets in the home. Would require Garda vetting and references, Childs first aid and certifications would be a plus!