Kalahari Resort, in Sandusky Ohio. Kalahari was nice enough to offer us a one night stay, and I am so glad we went, it was a blast. My boys are 1 and 3, and they had the time of their lives splashing around the country's largest indoor waterpark.
Our room there was fantastic, and plenty big enough for the four of us. We had two queen beds, plus a pull-out couch. There was a table and chairs, a fireplace, flatscreen TV, refrigerator refrigerator microwave, balcony with seating, and more.
The resort itself was super kid friendly, with lots of shops, restaurants, a giant arcade, miniature golf, a large indoor playground, a spa, stuff for grownups and of course the waterpark. In the summer they also have an outdoor adventure park, animal park, and more.
I wouldn't hesitate for a second to vacation here again. Check out their specials and packages here. Check out their rates and availability here.
Note: Kalahari gave us a complimentary one night stay in exchange for a review. Please note that we were not paid, and this review is honest and sincere.