ודבר דבר (Dabair Davar): Talking About Calculations on Shabbos;
Understanding the Difference Between טירחא יתירה (Tircha Yeseira, Major Exertion) and טירחא סתם (Tircha Stam, Minor Exertion) on Shabbos;
Writing letters, numbers, images using chocolates, nuts, sugar, salt, licorice, etc.