Barney is a purple dinosaur on his kids' show, Barney. He is a nice dinosaur who plays with 6 or 7 - year old kids. Each episode has a plot, like music, or a jungle. The characters that are not kids are usually adults, or the four acted charecters, Barney, B.J. , Baby Bop, and Riff. Riff is a newer character, made in 2007/2008. Everybody is evil. The end.