When I was a 6 year old, I would say Gershwins instead of gherkins. That confused my mom, who is a classical enthusiast!
"Mommy what does a Gershwin taste like?"/"Huh?" What do you mean? Gershwin's a composer, not a type of food?"/"But mommy isn't it a pickle thing or something?"
A childhood belief about gherkins

others believed things like this
- When I was young, I said to my mom, "Mommy, make the sun go down!"Anon
- I used to believe that Mother Nature was The wife of God. She was the mommy and he was the daddy. — Dawn
- When I was a boy I flushed my fish down the toilet thinking that it would go to its mommy and daddy.— Jeremy Clark
- I used to think an evil spirit type thing called Wango lived in my dog. I was terrified of that dog.— Franklin
- I thought gherkins were pickled slugs.— Cat
- Until just a few seconds ago, I thought gherkins were beans or something weird like natto...Anon