The Letter M

Cole and Wilson Met again on a tree-lined road near some Morning glories.  They were stopped by a Monkey balancing on a Melon-colored M.  "Mind you don't miss N," the monkey hollered.  "I guess we have to go through the whole alphabet in the right order before we can leave," Cole said to his brother.  "I think you are right," Wilson agreed.  Rather than travel past the Mammal down the Middle of the road, the twins took off in two different directions, not sure where they were going next.