Rainy Day Playground Indoor strap swing (to be used with support system) Attaches easily with steel hooks to the Rainy Day Indoor Support Bar (sold separately). This rugged canvas swing is designed to hold and conform to your child's backside to offer a better sense of security. Great for use in home, school, and therapy settings. Turning your doorway into a sensory intergration center for play and therapy. The Rainy Day Indoor Playground System, the strap swing is ideal for families with limited or restricted access to outdoor play space.