6 years old
Write down the recipe for your own potion creation. Best Potion wins a prize.
Edible potion ingredients: colored punch, juices, colored sugar, etc
Measuring cups or beakers
Cups for the finished potions
Paper or recipe card sheets
Pens or pencils
Set up a potions class with interesting bottles containing various colored drinks, powdered sugar, spices, cut fresh mint, etc.
Have the guests mix their own potions, name them and list the functions.
Have the entire group vote on which is the best potion.
The HP Lexicon Encyclopedia of Potions is an excellent list of potion ingredients mentioned in the books.