Peter is Practicing His Letters

He gets that they are symbols for sounds.

He also gets that these are not real words (though, he did ask me how to spell "Boom").

And he gets plenty of belly laughs when he asks Mama to "read" what he wrote.

Mama: umm puh mooo, moo pooo, uh mop mmm ppuh, mm, oop moom, opoooom, boom!
Peter: That's a bullet shooting through a machinery and going back into a cannon.
Mama: That's what it sounds like?
Peter: Yep!
Mama: Cool!