If you’ve ever seen a remote-control boat skate across the water—or controlled one yourself—you know it’s a good time. These toys can accelerate up to 50 miles per hour, tearing up the waters in your ...

Each pointed a boxy radio control at his own DragonFlite 95, a meter-long vessel with a pointy sail like a shark fin. Sometimes the boats rounded markers made from painted Clorox bottles. Other times, ...