The Crown Center Ice Terrace is an outdoor rink, making it special right of the bat. It's not huge, but was big enough for me and my family, all of us being amateur skaters. The cost is reasonable and location is great. It's really fun to be downtown among the lights and crowds.
This is a KC classic. It is open throughout the week during the winter season. It is a large outdoor ice rink that has been around for years. The prices are affordable ($6 for ages 5-59; free for 4&under and 60& up; skate rentals are $3 or bring your own).
Again, this is another outdoor rink in a great loaction. It is literally across from Crown Center (shops with tons of food choices), Union Station/Science City and Kalidescope. So, this can be a two hour outing of just skating or a whole day of skating, actitivies, and lunch/dinner.