This was a creative subject for our class as a three year old mixed class with 18 students in it. The children decided to pick up on this topic since they were playing outdoors in the back yard and started imagining they are flying aeroplanes.
We discussed the procedure of how to board on an aircraft, made different flashcards and explained the procedure of departing, different kinds of aeroplanes, the inside of the airplane etc.
We then created a large cardboard aeroplane and they enjoyed playing with it going in and coming out of it.