There are many types of writing worksheets. There is the cursive writing worksheets and the kindergarten worksheets. The latter is more on letter writing and number writing. This is typically given to kids of aged four to seven to first teach them how to write. Through these worksheets, they learn muscle control in their fingers and wrist by repeatedly following the strokes of writing each letter.
What you can do to make working on printable worksheets more enjoyable for your child may often depend on the age and interests of the child. For example, older children may have to read a poem which is on the sheet and then write their own poem in the same sort of style.