How to recognise Oklahoma on a map
Oklahoma's outline looks like an oak cart.
His oak cart had his whole home in it (Oklahoma).
Two U.S. states, Kansas and Oklahoma, together look like a Coke can on top of a cart:
This is very useful for remembering the shapes, and for being able to recognise them instantly on a map. "Can" gives us Kansas, and by imagining the cart is made of oak, we get Oklahoma.