Muggle supplies used to create Harry Potter's stamping grounds:
• A quarter-mile of cardboard.
• 160 sheets of Styrofoam (Diagon Alley).
• 537 rolls of toilet paper and paper towels (candles in the Great Hall).
• 537 tea lights.
• 180 foam pool noodles (to make the edging around doors and windows).
• More than 5,000 Command Strips (to hold the walls up).
• 307 bottles (for Prof. Severus Snape's potions room).
