A preschooler has successfully completed the test item “counts 5 blocks” on the Denver II...

The ability to move five blocks to a piece of paper and state there are five blocks on the paper is evidence

that the preschooler has the ability of conservation. This concept refers to the fact that the quantity of something

doesn’t change just because the shape, contour, and so on has changed. Five blocks are still five blocks, whether

they are lying beside the paper, stacked on the paper or moved to the paper.Centrationis the ability to concentrate

on one feature of a situation while neglecting all other aspects.Causalityis based on the sequence of events, one

event ordinarily following another.Nonreversibilityrefers to the inability of preschoolers to reverse their

operations. They are only able to think forward, not retrace or reverse their thought processes.Health Promotion

and Maintenance