If school is not further than 1 km, kid can just walk there. And in most German (and other European) cities schools are nearby.
And for locations that are remote, there are school buses, and public buses too...
Kid transportation is important, but it doesn't have to be cars. (I won't even go into kids who bycicle to their schools.) Of course, I understand that for kindergarten it's a different topic, but if we are taking about schools a person is already of age where they know where their home is and where they are going to.