Discovery Zone (DZ) was a chain of entertainment facilities featuring games and elaborate indoor mazes designed for young children, including slides, climbing play structures and ball pits. The chain was founded by Ronald Matsch, Jim Jorgensen and Dr. David Schoenstadt in 1989. The first location was opened in Lenexa, Kansas, in January 1990. An early investor and vocal supporter of the company was tennis player Billie Jean King.Other places similar to Discovery Zone include Chuck E.