We write in Russian letters: книга-тренажер.

Workbooks from the 'Transparent Writing Books' series are a simple yet effective way to develop fine motor skills and learn basic topics: Russian and English alphabets, numbers, and basic counting. Writing books with transparent pages help a child practice writing hooks, sticks, letters, and numbers. The child traces the shining outline of a letter, number, or stick on the designated page. What's the advantage of this approach? A model is always in front of the child's eyes: by copying it through the semi-transparent page, they visually memorize the correct writing and get used to writing correctly. After using writing books with transparent pages, it becomes much easier for a child to transition to independent writing.