“Not long ago, friends of mine came to me with their their nine-year old son. He couldn’t write.
Again, I suggested zigzags.
Take a pen in your hand.
Move it up and down, as if you were waving goodbye.
That’s the movement you need.
How do you turn zigzags into letters?
You depart slightly from a regular movement, just enough to make characters.
A closed top becomes the letter a.
An extended line makes an ascender.”.
(Gunnlaugur SE Briem)