I'm trying to remember the name of a kids show that used to be on Nickelodeon during the early to mid 90s. It's about a group of kids who sneak onto an alien ship and end up traveling in outer space together. There was a girl who was purple, and the only other character I can really describe is another girl with rainbow hair who could scream really loud and talked to an invisible friend, who later became a character as well.
If anyone could help I'd really appreciate it! Thanks!