Here is a set of colouring and writing worksheets for children who are more confident writers. I have included one line of dotted letter outlines and one blank line for children to practice the letter formation themselves. They can be used whenever the child is ready but I imagine they will be suitable for most 4 year olds.
Hope someone finds them useful! If you would like me to alter the worksheets to better suit your child, please contact me with your request and I will help if I can insha Allah.