A specific play pattern recognized in the toy industry wherein a child uses 2 objects to represent characters interacting - one characters is bobbed up and down and the other character is then bobbed up and down in alternate to represent conversation.
My Little Pony #1 "Doinky doinky doinky, dionky doinky doink"
My Little Pony #2 "Doink doinky doinky doink!"