Australian residents please answer. Is there anything motorised that I can buy that you don't need a licence?

I have a 21 year old sister in law living with us. We are in 42 degree weather here and she has to walk into town 2km everyday for work. She does not have a drivers licence. I offer to drive her but with 2 children under 2 it is a hle. She is happy to walk but is exhausted in the heat. Does anyone have any solutions.