The main theme of 'Magic of Grammar: An Interactive Holiday Lesson' is teaching grammar concepts such as nouns, verbs, prepositions and punctuation through engaging holiday-themed activities.
The 'Magic Show' activity in the 'Magic of Grammar: An Interactive Holiday Lesson' helps students revise singular and plural nouns by completing spells using plural forms of given nouns.
In the 'Letter to Santa' activity in 'Magic of Grammar: An Interactive Holiday Lesson', students practice punctuation marks by writing a letter to Santa Claus. They learn about capitalization and correct punctuation errors.