In many parts of the country (and world), winter time is when kiddos need plenty of things to do indoors as it's too chilly outside. Where my grandsons live, though, indoor fun is a must in the summer as triple digit heat often prevents outdoor play.

Whatever time of year children are stuck inside with little to do—whether it's because the weather is hot, cold or rainy—balloon pong is an easy and inexpensive way to provide hours of play.

WHAT YOU NEED

• Paper plates (one per child)

• Craft sticks, the thick ones that look...