I love the lazy river at Typhoon Lagoon. When you get too tired being thrown around in the wave pool, you can just float along on a tube. It's also nice because you can just hop off your tube and get pulled along in the water.
Deep River Waterpark- Crown Point, IN - Great place to visit in the summer for all ages. They have everything from The Lazy River to Body & Tube slides, places to eat and merch shops. Admission prices depend on age and height. When it's not summer season, ice skating is available in the winter!