Kim was first given a part in a couple of commercials when she was just a toddler, then got into acting in 1970 (6 years old) in "Nanny and the Professor" as Prudence Everett. One of her most popular movies is "Escape to Witch Mountain" (1975) where she became very popular and got to be known for her "special abilities".
Kim continued acting regularly until "Tuff Turf" in 1985, at which time she decided to change to a normal life. She did a little acting afterwards, but was pretty much out of show biz. The next several years she had a family and enjoyed her private life.
Now that her 4 children are older, she decided to go back into show biz on a small scale. She is currently working on a new film called "Legend Hunters" by Portolan Pictures.
You can check her site at kimrichards.net for updates.