I'm going to be a self promoter——since you are on the Mac, I would be remiss not to mention my own project, SeaTurtle: https://www.oaksnow.com/seaturtle/ https:

I'm going to be a self promoter——since you are on the Mac, I would be remiss not to mention my own project, SeaTurtle: https://www.oaksnow.com/seaturtle/ https://www.oaksnow.com/seaturtle/ Although it's not fully keyboard controlled, one of your criteria, it does have animated graphics, included Animated GIF export of your creations, so your child can share the output with friends.