There are many free worksheets available, especially online, but still the best worksheet is one that you personally draft. This way, you are able to match the level of difficulty of the activity in accordance to the performance level of your own students. It is not bad to reuse worksheets for another batch of students, but once in a while it is also better to vary the activities you give to kids. Worksheets can be made for fun if it is attuned to the current interests of kids. The kids will respond better to activities close to their own interests.
The common worksheets used in schools are for writing letters and numbers, and connect the dots activities. These are used to teach the students under kindergarten. The letter writing involves alphabets and words. These worksheets illustrate the different strokes that must be used to create a certain letter or number. Aside from this, such worksheets can also illustrate how to draw shapes, and distinguish them from one another.