The kids could bring their bike, or play badminton or volleyball. There are tons of activities you can do as a family or with friends at the park.
If the wind is good, flying a kite will be fun too! The kids will have fun and definitely the adults too.
If you live somewhere near Bellevue, you might want to check out Newcastle Beach Park. It is along highway 405, exit 9. So far this is the best park near this area. I love the open field and the board walk. Playground for kids, both for toddlers and big kids.
This is one of the most inexpensive way to spend quality time with friends and family. We only have three months of summer, so we spend every single day outside when the sun is out.
Have a fun summer everyone!