This idea works well in pairs. Model in front of the class first.
1. Write numbers or letters on the back of a student/classmate by using your finger.
2. The classmate guesses the number/letter.
3. Make it more advanced. Larger numbers / words.
You can also do a variation of this by doing the same on the palm of the person.
Really “visceral” and kinesthetic way of teaching basic content.
Body writing,