Sensorimotor ( birth to 2 years old )

This video shows how a child at sensorimotor stage will experience Object Permanence. Object Permanence is the infant's ability to recognise one object at a time or one location at a time. If the object is changed or hidden or the location is changed, the infant would not be able to accommodate this change and would still be looking the the object at the last place the infant found it, as shown in the video.

Pre-operational child ( 2 to 7 years old )

this video explains how a child at pre-operational stage thinks and process information.

formal operational child ( 11 years & above )

conservation of task ( 2 to 7 years old )

this video shows pre-operational child and a conservation task

conservation of mass ( 2 to 7 years old )

this video shows how a 4 year old doesn't have the idea of conservation of mass or space.

concrete operation - deductive reasoning ( 7 to 11 years old )

this video shows how children from 7 to 11 years old are able to use deductive reasoning.

concrete operational child ( 7 to 11 years old )

Object permanence ( birth to 2 years old )

Piagetian Theory

Here's a powerpoint presentation I did on Piagetian Theory for my Master in Education's Cognitive Development Course. I hope it will be able to help you in understanding how a child thinks and what processes goes on in a child's mind.