Most toddlers can understand nonverbal signs used in the past with familiar adults.A good example of one is

Question

Quizplus · Accepted Answer

The stretched straight forward arm with an opened hand palm out and fanned fingers facing is a common nonverbal sign used by adults to indicate "stop" or "wait" to a toddler who is about to engage in a potentially dangerous or inappropriate behavior. Toddlers who are familiar with this sign are likely to understand it and stop their actions in response. Smiling when a toddler exhibits poor behavior (choice B) is not a commonly used nonverbal sign and may confuse or reinforce negative behavior. Similarly, raising a fist in the air (choice C) can be intimidating or frightening to a toddler and is not a commonly used nonverbal sign in this context.

Most Toddlers Can Understand Nonverbal Signs Used in the Past