Current College Students - Part-time nanny

Our wonderful nanny will be heading off to law school this fall, so we are looking to welcome a new part-time nanny on Mondays and Wednesdays from 9am-4:30/5pm. Position would start mid-August. Primary duty will be caring for our 2.5 year old daughter while our boys (10 and 11) are at school, but will also include supervising all 3 for after school hours until I'm home from work. Duties also include light housekeeping like children's laundry, dishes, and general tidying to keep the household running smoothly. I basically need someone to fill my shoes when I am not there. We're looking for someone who brings a cheerful spirit and positive attitude, has experience with all ages, and is extremely reliable. Must be a non-smoker, have a clean record, and reliable transportation. We are located in Northwest Dallas near Marsh and Royal. We currently pay our nanny $22.50/hr. Would like to keep the same rate, but open to discussion. Thank you!