Inexpensive fitness equipment, such as jump ropes, elastic bands, different size balls, and water-filled jugs can be used for fitness fun. Create simple obstacle courses. Let kids plan beach trips and use the sand for mini-exercise challenges — kids can do pushups and jumping jacks or create mini sand dunes to jump over. Summer is the perfect time for outdoor roller-skating or cool indoor ice skating if available. Introduce your kids to yoga “in the shade,” or indoors. Create music lists for “dance” classes.