Welcome to Alice? I hope you and your son enjoy your exploration?
After working through the tutorial, you may want to visit the website hosted by Dr Susan Rodger at Duke University that contains a wide variety of examples and tutorials?
https://www2.cs.duke.edu/csed/alice/aliceInSchools/
I have also found the resources (non-Alice) at Code.org to be very engaging.
All the best,
Don Slater