I used to get ivy confused with ivory.
A childhood belief about plants

others believed things like this
- I used to think no one built the ark because I confused it with Noah.Anon
- As a small child I always confused someone being unconcious with someone being dead.— Rick
- I used to believe that "sue" meant murder, so in movies when someone is getting sued I got really confused— I don't know
- My older sister used to tell me that ants were bees. My mom was very confused when I refused to go outside.— Paulette
- I used to be really confused about the whereabouts of God.
On account of: "Our Father who Aren't in Heaven".— Tania Bradshaw - When my friend told me her cat was moulting I thought she said melting. I was confused for a while.Anon