• The Book of Wizard Magic 

• Recipes for Family Fun - Invisible Ink Recipe for party invitations

• Kids Domain Crafts - Wizard Crafts

• Muggle Quidditch

• Virtual HP Theme Park (Good for ideas)

• WannaLearn.com: Just for Fun : Magic Tricks
• Have a Harry Potter party! (description of a party as done with teens/adults, not little kids)
• Kidsreads.com - Host a Harry Potter Birthday Party: Games
• Hogwarts Distance Learning Program for Homeschoolers - A to Z Home's Cool Homeschooling
• Welcome to the Hogwarts Celebration!
  • The Hogwarts Celebration - The Preparations
  • The Hogwarts Celebration - The Invitations
  • The Hogwarts Celebration: Hogwarts and Honeydukes Recipes
• Harry Potter Craft Projects and Activities - Wizard Party Ideas
• Amazon.com: Sports & Outdoors: Harry Potter Svengali Deck
• Funology.com -- Abracadabra -- Magic tricks
• Harry Potter Party: food and activities with printout house badges
• Harry Potter Eeylops Owl Emporium Diagon Alley Kit
• another Harry Potter Eeylops Owl Emporium Diagon Alley Kit
• Harry Potter Sorcerer's Stone Amulet Specialty Kit
• Harry Potter Spells and Potions Hogwarts Class Kit
• Harry Potter Potion Of Drought Apothecary Kit
• Harry Potter Teleidoscope Construction Hogwarts Class Kit
• Glass Calligraphy Pens, Goose Writing Quills, Reed Pens, Bamboo Pens and Calames
• Harry Potter Birthday: Magic tricks and recipes
• Birthday Party Games Lady- Harry Potter Party Games
• We don't suggest you do Lord Voldemort's Office Christmas Party, but it is a funny read while HP party planning.
• Kids Domain Crafts - Magic Potion Trick
• Magic Tricks .Com: The Magician's Magic Shop | Magic History, Tricks, Houdini, Maigc Triks
• Haunted House Tips
• Haunted Halloween House - Tricks and Treats!

• Mini Fogger Pro

• Tekno Bubbles (Blacklight Bubbles)

• The Book of Wizard Parties 

• UK Private Guide Sightseeing Tours - Harry Potter Theme Tours Map

DVD: Harry Potter - Years 1-3 (Harry Potter and the Sorcerer's Stone/Harry Potter and the Chamber of Secrets/Harry Potter and the Prisoner of Azkaban) (6-Disc DVD Set) (Widescreen Edition) Halloween: The Best of Martha Stewart Living (The best Halloween how-to book ever.  This book proves once and for all that Martha is actually a closet "Goth")

MORE Harry Potter Costume Party and Cosplay Links: 

• Activities and Special Effects:  magic tricks, online activities, haunted house ideas, lots of ideas for HP type stuff to do.

• Costumes: where to get supplies, how-to advice, cosplay links for finding others who want to dress in HP costumes

• Decor and Props: ideas for making, and places to buy, decorating items for turning your room(s) into Hogwarts for the day, or forever.  Also how to make/buy wands and other props.

• Edibles: Foods to make or buy for Potter Parties

• Party Tips and Supplies: specifically PARTY advice links, plus links to suppliers of tablewear.

• Printables and Fonts: things you can print out and use, plus suitable fonts for making your own printables.  Includes Free "Butterbeer" Labels for Soda or Beer  

• Reference Pictures and General HP Info Sites: to give you ideas, or help you make your replicas right.