When introducing silent e (as I call it), I told students that silent e had to remain quiet. He gets mad that he can’t talk, so he pinches the vowel and makes it say its name. I loved using BrainPop Jr. to introduce lessons and was happy to see they had one for teaching silent e.
I also found this Silent e Song on YouTube by Preschool Prep Company. It’s another fun way to teach students that the e at the end of the word makes the vowel say it’s name.