Do you want your children to think you are a wizard? Do you want to show something interesting at a party?

Follow these simple steps to perform the magic trick:

1. Prepare the cup: Fill the cup with water and let it sit for a minute.
2. Refill and conceal: Fill the cup with water again, and then cover the small hole on the outside of the cup with your finger.
3. Pour out the water: Carefully pour out the water from the inside of the cup.
4. Cast the spell: Say the magic word, "Aguamenti!"
5. Release the magic: Remove your finger from the hole to let air in.
6. Behold the wonder: Watch in amazement as the cup magically refills itself!

Pro Tip: For an extra touch of mystery, print these instructions on non-uniform or dark material to keep the secret hidden!