Gross motor skills develop from using large muscles—like those in the arms, legs and torso—over and over. Activities that build those gross motor skills rely on balance, coordination and muscle control. And that’s not just important for sports and other things usually associated with big movements. Since the muscle groups all work together, building gross motor skills also develops unexpected things—like academic readiness and self-esteem. Indoor play equipment can help your child climb, crawl and slide their way to confidence.