Early training is easier and faster, To illustrate, if you shape clay while it is still soft, it will be easier and flexible, similarly the childs young brain is easy to mold. We can start training them while they are still inside the mothers womb. And when the child is born his brain is ready to learn. Child fast development takes place during the first year after his birth. He starts to recognize movements, sounds, shapes, colors, and even counts. So if you develop your child earlier the result will be better. kindergarten will be too late. Shape your child the way you want, If you want your child to be a good speaker, you must always read and speak to him. If you want him to be a musician or a simply a music lover, sing to him or let him listen to music. Hugs and touches together with words of "I love you" can make him a loving person. The more new things he will be exposed to, the more he will learn. Developing other skills require variety of different stimuli. Though your child may not necessarily be a genius but pre-schooling him means preparing his mind and equipping him with the tools he needed when he goes to school.
Another thing to look out for is what the pupil will need to solve the worksheets? Does the worksheet require the use of crayons? Does it require other things like a pair of scissors, glue and so on? Before you buy worksheets, make sure to check if they have been created to suit the geographical location that you reside in. The language and usage of words differs from country to country. It is no point buying a worksheet which is designed for children in the US for children residing in India. Also see if the worksheets involve just one way of teaching or multiple ways. Do the worksheets involve short assessments? Does it have some activity built in; does it involve elements from the childs surroundings?