Cognitive development is in essence the activation of brain cells carrying input messages from the brain to all the organs of a developing body. A child cannot achieve picture-colouring if the relevant brain input cells were not activated to stimulate eye to hand co-ordination. Similarly, a primary school learner cannot master the intriguing qualities of writing numerals and alphabetical letters if the relevant brain input cells were not activated. Adults do not remember their intense effort, mastering those skills. Cognitive Learning in the primary school environment require understanding of the development psychology of a learner.

It is only a learners writing skills, as a 'cognitive action', that can represent their level of knowledge in a test. No form of electrical devices can circumvent or prepare a learner in this extremely valuable educational cognitive phase of learning.