Paris English Forums

Hi, I will be visiting Paris for about six months with my husband and my 2 yrs old daughter. My husband would be working full time, while I work as a freelancer, so I would need a few hours (3-4 hours) of child care service, so that I can complete my work. I read on some forums that "creches" have a long waiting list, so that's not an option for me. I also read about nannies, but I am not sure how that arrangement works and how much it costs. Can anybody help me please? What are the daycare/childcare options that short terms visitors to Paris have?