I have a friend whose son knows that eight is a number and ate is the past tense of eat. Because of this, he thinks that as well as being able to say that you ate something, you can also say that you sevened it, or sixed it, and so on. (Maybe he thinks that refers to the number of times you chew each mouthful before swallowing it, in which case if you say you oned it then presumably you gulped it down in one go without chewing it first!)
A childhood belief about speaking

others believed things like this
- My brothers friend still thinks he will be a kangaroo when he grows up and he's 9!!!!!— Jane Rom
- when i was little i believed that your social security number was the number you were born on the earth — christine
- My five-year-old cousin thinks that his parents purchased him from Wal-Mart.Anon
- I thought i had to chew my food 27 times before i could swallow because Stephanie said it on Full HouseAnon
- I used to believe there was a number "eleventeen". I could never quite work out where it went, though.— Matthew
- I used to think boys went "number two" with their pee pees. Anon