Introduce young students to binary code with a fun hands on activity creating binary bracelets.

https://kidssteamlab.com/birthday-binary-code-kids/

Or amaze students with “Magic” and guess students birthdays with this binary number game. It will have them guessing and its a great way to introduce binary numbers.

information in this link.

http://mathforum.org/library/drmath/view/56020.html

and

https://games4gains.com/blogs/teaching-ideas/magic-math-card-trick