Still looking for an event topic for your July or August event? Mozilla has put together a package that will help make your next event easy. They’ll help you create an event that will help your members learn about the culture, mechanics, and citizenship of the Web by making something! Each of the featured activities have offline options as well. Visit Mozilla's discussion forum for help and to share your experience. Check out the sample activities.
And if you’re looking for a partner to help you deliver the event why not contact your local Mozilla Club? Parties are more fun with more people, so check with the local club to see if they want to do something with you.
Questions? Reach out to Mozilla’s Amira at amira@mozillafoundation.org and give the website a read. https://teach.mozilla.org/events/
Good luck!