Children can work with simple numbers worksheets from quite an early age and you will have greater success in getting them to work on the worksheets if you combine that learning work with something practical, or at least something they enjoy doing.
Homeschool worksheets have pros and cons that depend on the type of material the worksheet deals with. One advantage is that worksheets are very handy if you want to give your child something to do. Some types of worksheets are very easy to grade and can be completed without much input from you. Worksheets can also give you a good idea of how much your child was able to understand of the subject matter.