Conversation whilst playing with Lego with the boy:
"...Dad, you know how much I like enja turtles?"
Me: "Ninja turtles?"
"No, en-jah turtles. They have lots of vehicles you know and do things."
"Do they like to have fights and run around a lot?"
"No, enja turtles, not neenja. They ride cars too. I think they eat cats."
"Ninja turtles, those are called Teenage Mutant Ninja Turtles -- they've been around since I was a teenager. Did you learn about them at playschool?"
"Yep, enja turtles, they're my favrit."
"...Dad, you need to learn how to call things names you know."
".... But you can call them ninja turtles if you want to."