When Jim Henson, the creator of the lovable Muppets characters, died in 1990 and in 2004, rights to older characters like Kermit the Frog were sold to the Walt Disney Co . But the entertainment industry legend would likely be very happy to know his five children have picked up where he left off with The Jim Henson Company. They are creating original characters in shows such as “Sid, the Science Kid,” which has a musical special airing on June 21, and even venturing into 3D with a remake of Henson's 1982 movie, “The Dark Crystal.” Lisa Henson, daughter of the Muppets creator and CEO of The Jim Henson Co. while her brother Brian is chairman, sees making a 3D movie as a natural progression for the company. She told Reuters her father's primary interests before he died were 3D films, computer animation and digital imagery. The film “The Power of the Dark Crystal” will be made in Australia with Lisa and Brian Henson among the executive producers and modern techniques like 3D and CGI taking puppets into the modern age. The movie is set hundreds of years after the events of the first film, when the world has fallen into darkness, and it follows the adventures of a mysterious girl made of fire who steals a shard of the legendary Crystal to try to reignite a dying sun. Henson the company was looking at a 2013 release for the movie, being directed by brothers Peter and Michael Spierig.