Keeping kids active is an ongoing challenge, especially in the era of smartphones and video games. Although many families build playground equipment in their backyards, some climates are too rainy, cold, or hot to allow year-round use outdoors.Indoor gyms are an excellent solution for kids, and they can be customized to suit their age and interests. It's easy to install a few basic pieces in the corner of a playroom or the basement.The focus for kids gym equipment needs to be a balance of fun, safety, and developmentally-appropriate activities. Some equipment choices depend on the child's age, but many items can grow with the child for at least a few years. Here are eight great home gym ideas to keep your children happy and healthy.