Decorate an old jar or box to hold all of your "Boredom Busters". Think of things your family likes to do, and that also do not cost a whole lot of money. Another idea is to just write random ideas on your monthly calendar, one per day, and make sure to do them!
If anything, just remember to chill, relax and have fun! It's summer!!! If you can't think of anything at all to do, here are a few ideas to get you started: