As some other posters said Moms often leave an older child part time while on mat leave so they get some stimulation since while mom is busy with the baby the tv often becomes the babysitter. I have one going on mat leave and the older child is staying full time for the first 6 weeks while mom gets her sea legs again and then the child is going to part time until the end of mat leave when both will cone here full time. It keeps their spot too!