With aerodynamic characteristics similar to that of a football, the Zoom Ball is a lightweight ball with two thin nylon ropes that pass through it. On each end a pair of handles allow two players to take turns zipping the Zoom Ball back and forth to one another - sending the ball a good 12 feet in less than a second. It takes coordination to open and close your arms with the right timing to keep the game flowing. As a side benefit, this is something to get kids (or grownups) active, easily helping to work up a sweat and get that heart rate pumping.
Additionally, the Zoom Ball is available at most major retailers and many specialty shops for right around $15 bucks, if not less.