Question: things to do in kauai with a 2 year old?
Answer: Hawaii Mountain Tubing Adventure Tour with Kauai Backcountry. ... 
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Blue Hawaiian Helicopters - Kauai's Best Helicopter Flight (from Lihue) ... 
4-Hour ATV Ride at Kipu Ranch - Picnic & Waterfall Swim Tour (from Lihue) ... 
Sacred Falls Adventure - Wailua River Kayak, Hike & Waterfall Swim.