This is a great, old school letter practicing book. Tons of repetition that kids don’t tend to like, but helps to reinforce one letter at a time. Definitely takes patience. I would suggest one page/letter at a time and take a break for 4-5 year olds who aren’t old enough for school yet. Take it slow. They don’t need to be stressed out too soon, and this book is great for a slow fundamental basics start.