A theory is useless if not applied. So I will now present the practical applications of Piaget's Theory of Cognitive Development. Due to limited characters that can only be typed via cellphone, I will discuss this by stages. Below are the practical applications parents, teachers and the like can do. These are self-explanatory so I just enlisted them.
1. Interact with them more often. Show funny faces, play "pick-a-boo", smile at them, etc. Let them meet different people especially family members because at this stage, they can recognize faces.
2. Talk to them. Ask questions as if they know how to speak. Let them talk their own "language" because they like hearing their voices and other sounds too.
3. Let them do simple tasks by themselves like picking up their own toys when they play, reach a nearby object, putting them inside the box, and others.
4. Provide toys that are appealing to the senses: brightly colored, have catchy sounds (but not too much!), textured surfaces, etc.
5. Let them play toys that will not only let them enjoy but learn as well. Give them simple puzzles, building blocks, and other toys that will develop their mental ability. Don't forget to play with them.