If you have a child ages 8-12, you can register for a free 3 day camp held by Apple.
At the Apple Camp kiddos will learn how to shoot their own footage, create an original song in GarageBand on an iPad, and put it all together in iMovie on a Mac. This free workshop, held at Apple Retail Stores, spans three days and ends with campers debuting their masterpieces at the Apple Camp Film Festival. Space is limited and workshops fill up quickly.
You can register here- if you find your local store is already filled you might give them a phone call. There is a chance they offer waiting lists.
You can find more free Summer Activties for children by scrolling down here.