how do I relaunch the tutorial that begins on a mac when you first buy it?

My mother-in-law bought a new Macbook Air and someone helped her set it up but she has no idea how to use it. I have been trying to help her but it would be useful for her to do that tutorial that comes up when you first start a new Mac --- but I can't figure out how to relaunch that tutorial (if it exists anymore).

thanks!