The secret to adding a bit of magic into a lesson is simple:
Believe in magic yourself.
If you believe that life is full of wonders to be discovered, magical adventures to be had and interesting friends to be made then you will exude this in everything you do.
They say enthusiasm is contagious and children are especially susceptible to catching enthusiasm.
Therefore live everyday as if it's magical and you will turn your class into a fairy land full of fun and learning!