We went to Perry Aquatic Center inside Perry Park at Stop 11 Road this Monday. They have an area for kids with small slide. They also have a very small slide for very small kids. There are many lifeguads at the pool, so I was very comfortable at the pool. They also have 2 kinds of big slides; one for floats and the other for without floats. Unfortunately, all outside pools in Indianapolis are closing by 8/14. I wish they stay open until the end of August or so.
It costs $4.50 for adults, $3.50 for children (Ages 3-17) and Seniors (55+), and 2 & Under are free. They sell a Gator Aquatic Pass which you can use for all the pools in Indianapolis. The price $20 for $25 worth of swimming, $80 for $100 worth of swimming. The passes don't have experiation dates. It's really good deal!
The only disappointing thing was that they only sold drink and chips at confession stand. It would have been better if they offer hot dogs or something like that.