The Comfort Suites Milwaukee Airport hotel in Oak Creek, WI, offers a small water play area for young children.

This small indoor water park features three indoor swimming pools, a kiddy pool with a frog slide and several shooting fountains, an adult lap pool, and a whirlpool.

It's a bit of a stretch to call this an indoor water park, but very young children will enjoy it immensely and it's much better than a hotel with just a regular pool.