Each summer I do a day of fun with my brothers' kids. I used to take the kids somewhere fun/educational--but as the number of kids has grown-I've simplified. The kids don't care about fancy or expensive stuff, so I don't stress myself over minutia. For one brother's kids, it was a day of games, for another brother, it was a trip to the park with his kids.
After lunch out and a stop at the grocery store we headed home for games, movie and snacks. This year's theme was Harry Potter. Our games included Pin the Scar on Harry Potter, Bingo and a Table Quidditch. I also have Scene It Harry Potter and we made a "Who Am I?" game where the kids drew a name out of a hat and had to describe/impersonate the character (Kinda a mix of charades/20 questions).
For Pin the Scar on Harry Potter I did a search for a simple Harry Potter outline (less ink for my computer). I saved the image and inserted it into an Excel document. I stretched the image to make it 2 pages across and 2 pages long. When you print, it will print out on 4 pieces of paper, which you'll need to trim and tape together. I found my image here
For the lightning bolt scar, I used a sheet of return address labels. Click the image to download the PDF if you want to use them (you could probably just draw some on masking tape or other stickers). Look for the Harry Potter files after you click.
Table Quidditch was fun. I made the ring stands with dowels, plastic tubing and duct tape. If you poke around Google images you'll see much fancier versions (I rummaged through my garden shed and found all the stuff, you could also use a hanger, or pipe cleaners). Click the image below to download the PDF of the rules/instructions (look for the Harry Potter files). Note: I made the instructions before we played--with kids, it was better to play only to 50 points. We also taped the cups to the table. We played as teams (one match we were Slytherin vs. Griffindor).
For the movie, I picked up snacks and made some really simple labels. Magic Wands (licorice), Bertie Bott's Every Flavor Beans, Gummy Frogs and Potter Popcorn. We enjoyed the first Harry Potter movie together. You can use the labels I made here. For the soda, I used the cute 2 liter bottle labels that I found here (loved the site, but her food labels didn't line up with what I wanted to serve).
We had a great time together. During the movie we all had our magic wands out and did all the spells along with Harry et al :)