Summer is the best season to have fun with very little cash. There are a ton of free and lost-cost options during the season, not to mention that simply being outdoors is finally a treat again. We’ve rounded up some great options for having fun with kids this summer while still sticking to a budget. 1. Explore a national park National parks are one of our greatest national treasures. You can go hiking, camping, or even swimming in a huge lake or by a beautiful waterfall.