Recreational and artistic skates make up what most people consider "traditional" indoor skates. These can be indoor skates that children use in their "tiny tots" classes to skates that world-class competitive skaters use.
When comparing these indoor skates, be sure to notice what material the boots are made of, and also what type of bearings they use. A leather boot will last longer than most synthetic boots, and a good quality bearing truly determines how well the indoor skates will roll.
Take your time, don't be afraid to ask questions. Also, if you're buying indoor skates for a growing child, your child will probably outgrow the skates before they wear them out, so the best possible skate is not always the best choice.