Simon made a fantastic little game in scratch all by himself which can serve as a fun tool to train little children to use the mouse. You can find it in Simon’s shared projects at: https://scratch.mit.edu/projects/131801799/
Here Neva acts as a guinea pig.
Click on the green flag to see the circle multiply in a variety of colours. The circles move towards the cursor. Click on the bottom blue rectangle to clear. Click on the top blue rectangle to clear and stop the program.
It was great fun as they compared the multiplying circles to the fairy-tale magic porridge pot that kept making porridge.