There are buses that go form the Station to the Uni, it is a long walk.
Bruce Park Pre School- it is on Margate Avenue, just past Heatherhill Road, so past the uni a little way.
Or there is Frankston preschool centre, which is on Joy street, between the Station and the Cemetary, so on your way.

How old is DS now? Have a look for places that do 3 year old kinder, not just day cares, if he is turning 3 (if he isn't already)