WWOHP spell casting locations map (included with purchase of interactive wand). What the map says:
Where to cast spells
Your new wand allows you to cast spells at locations throughout all of Diagon Alley. To find a place where you can cast spells, follow the numbered icons on this map. Look for the bronze medallion in the pavement that matches the spell and symbol for that number. This is where you will cast your spell.
How to cast spells
With wand ready, stand at the medallion and face in the direction it points. Raise your wand and trace the shape of the spell symbol through the air while reciting the spell. If you make the correct gesture with your wand and recite the spell, magic will happen. If you do not succeed at first, keep practicing to improve your wand skills.
The maps are also embossed with a florescent material that, when held under certain lights, reveals a few secrets (aparecium, anyone?).
The lengths to which Universal and WB have gone to give fans of Harry Potter such an immersive experience when they visit the parks in truly incredible and is sure to be every Potterheads dream come true!