sitter for 3.5 year old

We are looking for a nanny or nanny share for our 3.5 year old boy. We need 2-3 hours of care on weekdays. Flexible hours between noon-5pm. Ideal for a student looking for extra cash. If a family already has a nanny, we are happy to do a nanny share. Main tasks would be engaging in activities in our backyard, taking to the nearby park etc. No pick up / drop offs needed. No expectation of additional chores or housekeeping. We live off of University Avenue.