Spikeball is a super-trendy, fast-paced game that combines elements of volleyball and four-square. Instead of hitting a large ball over a straight net, you’re smacking a softer, grapefruit-size ball onto a bouncy, ringed one, sort of like tetherball but without the string. This is a physical game, one that requires fast movement and probably some diving if you want to score points. You wouldn’t want to play it indoors, but it’s easy to set up in a backyard or nearby park. And it’s a great way to get teens off their screens and outdoors.