Here's a ready-made Summer Fun list for those of you who don't already have one. We found it over at the blog "It Happened like this" She's done a beautiful job with her layout and you can even put a photo of your family on the list. There's a Free Download for this chart too. Once you get it in Photo Shop you could make changes and add to or change the fun list.
Here's the finished product. Get the free download here
It is a 16x20 design that you can print at Costco (Double click on the photos to get a better look at the details)
This is the Summer Fun Chart that inspired her design. I think both are so cute! Find it here