This is what I use for both 4 and 5-year olds.
and lots more!
I use dotted lined paper and draw letters and numbers for the children to trace. I usually print their name, our phone number, and our address. In addition, I use the free worksheets from the following sources:
YouTube has videos for The Magis Schoolbus, Stanley, and Octonauts.
The “Free School” channel is another great source of learning about animals.
Coloring Pages for just about every character that your child knows and likes (this site is awesome, but be aware that it does have a lot of popups.)